david bcb7263ec6 ci: add tag-driven release workflow and centralize pinned versions ...

- Introduce ci/versions.env as the single source of truth for the mpv tag
  and every dependency pin; the three build scripts and all workflows now
  source it instead of redeclaring versions inline.
- Add release.yml: on a v* tag it reuses the three per-platform build
  workflows (workflow_call) and publishes the bare libmpv.so / .dll / .dylib
  assets plus a combined checksums.txt as a GitHub Release.
- Rework build-*.yml: trigger on pull_request (PR check) and workflow_call
  instead of push to main, and expose the artifact name/version as job
  outputs so release.yml can assemble the release assets.
- Route the Linux build through ccache (CC/CXX) so the CI ccache is actually
  populated and reused, fixing the 'Path Validation Error' on cache save.

2026-10-02 19:11:15 +02:00

..

workflows

ci: add tag-driven release workflow and centralize pinned versions

2026-10-02 19:11:15 +02:00