Merge gitea/act into act/

Merges the `gitea.com/gitea/act` fork into this repository as the `act/`
directory and consumes it as a local package. The `replace github.com/nektos/act
=> gitea.com/gitea/act` directive is removed; act's dependencies are merged
into the root `go.mod`.

- Imports rewritten: `github.com/nektos/act/pkg/...` → `gitea.com/gitea/act_runner/act/...`
  (flattened — `pkg/` boundary dropped to match the layout forgejo-runner adopted).
- Dropped act's CLI (`cmd/`, `main.go`) and all upstream project files; kept
  the library tree + `LICENSE`.
- Added `// Copyright <year> The Gitea Authors ...` / `// Copyright <year> nektos`
  headers to 104 `.go` files.
- Pre-existing act lint violations annotated inline with
  `//nolint:<linter> // pre-existing issue from nektos/act`.
  `.golangci.yml` is unchanged vs `main`.
- Makefile test target: `-race -short` (matches forgejo-runner).
- Pre-existing integration test failures fixed: race in parallel executor
  (atomic counters); TestSetupEnv / command_test / expression_test /
  run_context_test updated to match gitea fork runtime; TestJobExecutor and
  TestActionCache gated on `testing.Short()`.

Full `gitea/act` commit history is reachable via the second parent.

Co-Authored-By: Claude (Opus 4.7) <noreply@anthropic.com>

go.mod

@@ -9,7 +9,6 @@ require (
 	github.com/docker/docker v25.0.13+incompatible
 	github.com/joho/godotenv v1.5.1
 	github.com/mattn/go-isatty v0.0.20
-	github.com/nektos/act v0.0.0 // will be replaced
 	github.com/sirupsen/logrus v1.9.4
 	github.com/spf13/cobra v1.10.2
 	github.com/stretchr/testify v1.11.1
@@ -21,13 +20,34 @@ require (
 	gotest.tools/v3 v3.5.2
 )
 
-require github.com/prometheus/client_golang v1.23.2
+require (
+	github.com/Masterminds/semver v1.5.0
+	github.com/creack/pty v1.1.24
+	github.com/distribution/reference v0.6.0
+	github.com/docker/cli v25.0.3+incompatible
+	github.com/docker/go-connections v0.6.0
+	github.com/go-git/go-billy/v5 v5.7.0
+	github.com/go-git/go-git/v5 v5.16.5
+	github.com/gobwas/glob v0.2.3
+	github.com/imdario/mergo v0.3.16
+	github.com/julienschmidt/httprouter v1.3.0
+	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51
+	github.com/moby/buildkit v0.13.2
+	github.com/moby/patternmatcher v0.6.0
+	github.com/opencontainers/image-spec v1.1.1
+	github.com/opencontainers/selinux v1.13.1
+	github.com/pkg/errors v0.9.1
+	github.com/prometheus/client_golang v1.23.2
+	github.com/rhysd/actionlint v1.7.11
+	github.com/spf13/pflag v1.0.10
+	github.com/timshannon/bolthold v0.0.0-20240314194003-30aac6950928
+	go.etcd.io/bbolt v1.4.3
+)
 
 require (
 	cyphar.com/go-pathrs v0.2.3 // indirect
 	dario.cat/mergo v1.0.2 // indirect
 	github.com/AdaLogics/go-fuzz-headers v0.0.0-20240806141605-e8a1dd7889d6 // indirect
-	github.com/Masterminds/semver v1.5.0 // indirect
 	github.com/Microsoft/go-winio v0.6.2 // indirect
 	github.com/ProtonMail/go-crypto v1.3.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
@@ -37,33 +57,22 @@ require (
 	github.com/cloudflare/circl v1.6.3 // indirect
 	github.com/containerd/containerd v1.7.29 // indirect
 	github.com/containerd/log v0.1.0 // indirect
-	github.com/creack/pty v1.1.24 // indirect
 	github.com/cyphar/filepath-securejoin v0.6.1 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/distribution/reference v0.6.0 // indirect
-	github.com/docker/cli v25.0.3+incompatible // indirect
-	github.com/docker/distribution v2.8.3+incompatible // indirect
 	github.com/docker/docker-credential-helpers v0.9.5 // indirect
-	github.com/docker/go-connections v0.6.0 // indirect
 	github.com/docker/go-units v0.5.0 // indirect
 	github.com/emirpasic/gods v1.18.1 // indirect
 	github.com/fatih/color v1.18.0 // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect
 	github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376 // indirect
-	github.com/go-git/go-billy/v5 v5.7.0 // indirect
-	github.com/go-git/go-git/v5 v5.16.5 // indirect
 	github.com/go-logr/logr v1.4.3 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
-	github.com/gobwas/glob v0.2.3 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8 // indirect
 	github.com/google/go-cmp v0.7.0 // indirect
 	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 // indirect
-	github.com/imdario/mergo v0.3.16 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 // indirect
-	github.com/julienschmidt/httprouter v1.3.0 // indirect
-	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51 // indirect
 	github.com/kevinburke/ssh_config v1.6.0 // indirect
 	github.com/klauspost/compress v1.18.4 // indirect
 	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
@@ -71,34 +80,25 @@ require (
 	github.com/mattn/go-runewidth v0.0.20 // indirect
 	github.com/mattn/go-shellwords v1.0.12 // indirect
 	github.com/mitchellh/mapstructure v1.1.2 // indirect
-	github.com/moby/buildkit v0.13.2 // indirect
-	github.com/moby/patternmatcher v0.6.0 // indirect
 	github.com/moby/sys/sequential v0.6.0 // indirect
 	github.com/moby/sys/user v0.4.0 // indirect
 	github.com/moby/sys/userns v0.1.0 // indirect
 	github.com/moby/term v0.5.2 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/opencontainers/go-digest v1.0.0 // indirect
-	github.com/opencontainers/image-spec v1.1.1 // indirect
-	github.com/opencontainers/selinux v1.13.1 // indirect
 	github.com/pjbgf/sha1cd v0.5.0 // indirect
-	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/prometheus/client_model v0.6.2 // indirect
 	github.com/prometheus/common v0.66.1 // indirect
 	github.com/prometheus/procfs v0.16.1 // indirect
-	github.com/rhysd/actionlint v1.7.11 // indirect
 	github.com/robfig/cron/v3 v3.0.1 // indirect
 	github.com/sergi/go-diff v1.4.0 // indirect
 	github.com/skeema/knownhosts v1.3.2 // indirect
-	github.com/spf13/pflag v1.0.10 // indirect
 	github.com/stretchr/objx v0.5.3 // indirect
-	github.com/timshannon/bolthold v0.0.0-20240314194003-30aac6950928 // indirect
 	github.com/xanzy/ssh-agent v0.3.3 // indirect
 	github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
 	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
 	github.com/xeipuuv/gojsonschema v1.2.0 // indirect
-	go.etcd.io/bbolt v1.4.3 // indirect
 	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.65.0 // indirect
 	go.opentelemetry.io/otel v1.40.0 // indirect
@@ -115,8 +115,6 @@ require (
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 )
 
-replace github.com/nektos/act => gitea.com/gitea/act v0.261.10
-
 // Remove after github.com/docker/distribution is updated to support distribution/reference v0.6.0
 // (pulled in via moby/buildkit, breaks on undefined: reference.SplitHostname)
 replace github.com/distribution/reference v0.6.0 => github.com/distribution/reference v0.5.0