Add configurable forge directories setting for Actions

[silverwind]

Issue created by @silverwind via Claude Code

Feature Request

Currently, the workflow directory paths .gitea/workflows and .github/workflows are hardcoded in modules/actions/workflows.go (ListWorkflows and IsWorkflow functions). Gitea checks .gitea/workflows first, and if it exists, .github/workflows is completely ignored.

Proposal

Add a new app.ini setting under [actions] to make the forge directories configurable:

[actions]
FORGE_DIRS = .gitea, .github

• The setting defines which forge directories are searched for workflows (and potentially other forge metadata) and in what order (first match wins, like current behavior).
• Default value: .gitea, .github (preserving current behavior).
• Workflow paths are derived by appending /workflows to each forge directory.
• Admins who don't want .github/workflows to trigger Gitea Actions (e.g. for repos mirrored from GitHub) can set it to just .gitea.
• This is more future-proof than a workflow-specific setting, as other forge metadata files under these directories could also benefit from the same configuration.

Use Case

Repositories mirrored from or also hosted on GitHub often contain .github/workflows that are designed for GitHub Actions and will fail or behave unexpectedly when picked up by Gitea Actions runners. Currently, the only workarounds are:

1. Delete the .github directory from the repo
2. Add an empty .gitea/workflows directory to shadow it
3. Disable Actions entirely for the repo

A configurable setting would provide a clean server-level solution.

Related Issues

• Query both .gitea and .github for workflows #31456 — Query both .gitea and .github for workflows
• Disable workflows when mirroring repository #32010 — Disable workflows when mirroring repository
• Disable Action unit by default when mirroring a repo? #30350 — Disable Action unit by default when mirroring a repo