feat: Support graceful job step cancellation (#69)

* for gh-act-runner
* act-cli support as well
* respecting always() and cancelled() of steps
* setup-job, bug report, gh cli and watch wait call is cancelled early

main.go

@@ -1,36 +1,18 @@
 package main
 
 import (
-	"context"
 	_ "embed"
-	"os"
-	"os/signal"
-	"syscall"
 
 	"github.com/actions-oss/act-cli/cmd"
+	"github.com/actions-oss/act-cli/pkg/common"
 )
 
 //go:embed VERSION
 var version string
 
 func main() {
-	ctx := context.Background()
-	ctx, cancel := context.WithCancel(ctx)
-
-	// trap Ctrl+C and call cancel on the context
-	c := make(chan os.Signal, 1)
-	signal.Notify(c, os.Interrupt, syscall.SIGTERM)
-	defer func() {
-		signal.Stop(c)
-		cancel()
-	}()
-	go func() {
-		select {
-		case <-c:
-			cancel()
-		case <-ctx.Done():
-		}
-	}()
+	ctx, cancel := common.CreateGracefulJobCancellationContext()
+	defer cancel()
 
 	// run the command
 	cmd.Execute(ctx, version)