enhance: test on Windows and fix what it found (#1348)

Adds a weekly and on-demand workflow that runs the cross-compiled tests on Windows Server 2025 Core in a [dockur/windows](https://github.com/dockur/windows) QEMU VM, and fixes the Windows bugs it found in host and UNC paths, env handling, shell quoting, post-task scripts, health checks, checkout, action symlinks, step summaries, Git client certificates and docker mode from a Windows host.

Host-mode steps now emit UTF-8, `bash` falls back to Git's bash instead of the WSL launcher, the runner can run as a native Windows service, steps can keep background helpers with `RUNNER_TRACKING_ID`, and Windows arm64 binaries are released.

Fixes: https://gitea.com/gitea/runner/issues/1339
Fixes: https://gitea.com/gitea/runner/issues/637
Fixes: https://gitea.com/gitea/runner/issues/1172
Fixes: https://gitea.com/gitea/runner/issues/347
Reviewed-on: https://gitea.com/gitea/runner/pulls/1348
Reviewed-by: bircni <[email protected]>

act/container/tar.go

@@ -36,7 +36,7 @@ func writeFilesTar(ctx context.Context, w io.Writer, uid, gid int, files ...*Fil
 }
 
 // writeDirTar prefixes entries with dstPath for extraction at root.
-func writeDirTar(ctx context.Context, w io.Writer, dstPath, srcPath string, useGitIgnore, skipGitDir bool, uid, gid int) error {
+func writeDirTar(ctx context.Context, w io.Writer, dstPath, srcPath string, useGitIgnore, skipGitDir bool, uid, gid int, executable bool) error {
 	logger := common.Logger(ctx)
 	tw := tar.NewWriter(w)
 	srcPrefix := strings.TrimSuffix(filepath.Dir(srcPath), string(filepath.Separator)) + string(filepath.Separator)
@@ -47,7 +47,7 @@ func writeDirTar(ctx context.Context, w io.Writer, dstPath, srcPath string, useG
 		SrcPrefix:    srcPrefix,
 		SkipGitDir:   skipGitDir,
 		UseGitIgnore: useGitIgnore,
-		Handler:      &filecollector.TarCollector{TarWriter: tw, UID: uid, GID: gid, DstDir: dstPath[1:]},
+		Handler:      &filecollector.TarCollector{TarWriter: tw, UID: uid, GID: gid, DstDir: dstPath[1:], Executable: executable},
 	}).CollectFiles(ctx)); err != nil {
 		return err
 	}