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>

act/runner/testdata/actions/node20/node_modules/universal-user-agent/LICENSE.md

@@ -0,0 +1,7 @@
+# [ISC License](https://spdx.org/licenses/ISC)
+
+Copyright (c) 2018, Gregor Martynus (https://github.com/gr2m)
+
+Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

act/runner/testdata/actions/node20/node_modules/universal-user-agent/dist-node/index.js

@@ -0,0 +1,18 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+function getUserAgent() {
+  if (typeof navigator === "object" && "userAgent" in navigator) {
+    return navigator.userAgent;
+  }
+
+  if (typeof process === "object" && "version" in process) {
+    return `Node.js/${process.version.substr(1)} (${process.platform}; ${process.arch})`;
+  }
+
+  return "<environment undetectable>";
+}
+
+exports.getUserAgent = getUserAgent;
+//# sourceMappingURL=index.js.map

act/runner/testdata/actions/node20/node_modules/universal-user-agent/dist-node/index.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"index.js","sources":["../dist-src/index.js"],"sourcesContent":["export function getUserAgent() {\n    if (typeof navigator === \"object\" && \"userAgent\" in navigator) {\n        return navigator.userAgent;\n    }\n    if (typeof process === \"object\" && \"version\" in process) {\n        return `Node.js/${process.version.substr(1)} (${process.platform}; ${process.arch})`;\n    }\n    return \"<environment undetectable>\";\n}\n"],"names":["getUserAgent","navigator","userAgent","process","version","substr","platform","arch"],"mappings":";;;;AAAO,SAASA,YAAT,GAAwB;AAC3B,MAAI,OAAOC,SAAP,KAAqB,QAArB,IAAiC,eAAeA,SAApD,EAA+D;AAC3D,WAAOA,SAAS,CAACC,SAAjB;AACH;;AACD,MAAI,OAAOC,OAAP,KAAmB,QAAnB,IAA+B,aAAaA,OAAhD,EAAyD;AACrD,WAAQ,WAAUA,OAAO,CAACC,OAAR,CAAgBC,MAAhB,CAAuB,CAAvB,CAA0B,KAAIF,OAAO,CAACG,QAAS,KAAIH,OAAO,CAACI,IAAK,GAAlF;AACH;;AACD,SAAO,4BAAP;AACH;;;;"}

act/runner/testdata/actions/node20/node_modules/universal-user-agent/dist-src/index.js

@@ -0,0 +1,9 @@
+export function getUserAgent() {
+    if (typeof navigator === "object" && "userAgent" in navigator) {
+        return navigator.userAgent;
+    }
+    if (typeof process === "object" && "version" in process) {
+        return `Node.js/${process.version.substr(1)} (${process.platform}; ${process.arch})`;
+    }
+    return "<environment undetectable>";
+}

act/runner/testdata/actions/node20/node_modules/universal-user-agent/dist-types/index.d.ts

@@ -0,0 +1 @@
+export declare function getUserAgent(): string;

act/runner/testdata/actions/node20/node_modules/universal-user-agent/dist-web/index.js

@@ -0,0 +1,12 @@
+function getUserAgent() {
+    if (typeof navigator === "object" && "userAgent" in navigator) {
+        return navigator.userAgent;
+    }
+    if (typeof process === "object" && "version" in process) {
+        return `Node.js/${process.version.substr(1)} (${process.platform}; ${process.arch})`;
+    }
+    return "<environment undetectable>";
+}
+
+export { getUserAgent };
+//# sourceMappingURL=index.js.map

act/runner/testdata/actions/node20/node_modules/universal-user-agent/dist-web/index.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"index.js","sources":["../dist-src/index.js"],"sourcesContent":["export function getUserAgent() {\n    if (typeof navigator === \"object\" && \"userAgent\" in navigator) {\n        return navigator.userAgent;\n    }\n    if (typeof process === \"object\" && \"version\" in process) {\n        return `Node.js/${process.version.substr(1)} (${process.platform}; ${process.arch})`;\n    }\n    return \"<environment undetectable>\";\n}\n"],"names":[],"mappings":"AAAO,SAAS,YAAY,GAAG;AAC/B,IAAI,IAAI,OAAO,SAAS,KAAK,QAAQ,IAAI,WAAW,IAAI,SAAS,EAAE;AACnE,QAAQ,OAAO,SAAS,CAAC,SAAS,CAAC;AACnC,KAAK;AACL,IAAI,IAAI,OAAO,OAAO,KAAK,QAAQ,IAAI,SAAS,IAAI,OAAO,EAAE;AAC7D,QAAQ,OAAO,CAAC,QAAQ,EAAE,OAAO,CAAC,OAAO,CAAC,MAAM,CAAC,CAAC,CAAC,CAAC,EAAE,EAAE,OAAO,CAAC,QAAQ,CAAC,EAAE,EAAE,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,CAAC;AAC7F,KAAK;AACL,IAAI,OAAO,4BAA4B,CAAC;AACxC;;;;"}

act/runner/testdata/actions/node20/node_modules/universal-user-agent/package.json

@@ -0,0 +1,31 @@
+{
+  "name": "universal-user-agent",
+  "description": "Get a user agent string in both browser and node",
+  "version": "6.0.0",
+  "license": "ISC",
+  "files": [
+    "dist-*/",
+    "bin/"
+  ],
+  "pika": true,
+  "sideEffects": false,
+  "keywords": [],
+  "repository": "https://github.com/gr2m/universal-user-agent.git",
+  "dependencies": {},
+  "devDependencies": {
+    "@gr2m/pika-plugin-build-web": "^0.6.0-issue-84.1",
+    "@pika/pack": "^0.5.0",
+    "@pika/plugin-build-node": "^0.9.1",
+    "@pika/plugin-ts-standard-pkg": "^0.9.1",
+    "@types/jest": "^25.1.0",
+    "jest": "^24.9.0",
+    "prettier": "^2.0.0",
+    "semantic-release": "^17.0.5",
+    "ts-jest": "^26.0.0",
+    "typescript": "^3.6.2"
+  },
+  "source": "dist-src/index.js",
+  "types": "dist-types/index.d.ts",
+  "main": "dist-node/index.js",
+  "module": "dist-web/index.js"
+}