Play Framework

chore: bump version to 1.11.12

- exclude dev-only paths from dist artifact: framework/test-src,
  openspec, .claude, CLAUDE.md, sync-fork.sh. Same pattern as the
  existing .github exclude — fork-maintainer / project-tooling
  content has no place in a user-facing distribution.
- the framework/test-src exclusion specifically resolves an unzip
  warning-as-failure on consumers that strict-check exit codes:
  Play's own I/O test fixtures contain non-UTF-8-encoded zip
  filenames (German "Übersicht §18", Chinese / Korean) which trip
  Info-ZIP unzip's "mismatching local filename" warning + exit 1.
  Test fixtures aren't needed by Play users at all, so dropping
  them sidesteps the warning entirely.
- bump baseversion to 1.11.12 in framework/build.xml; update
  framework/src/play/version to match (no trailing newline,
  matching prior format).

Verified: ant package -Dbuild-release=25 builds dist/play-1.11.12.zip
(113 MB, down ~2 MB), unzip lists 0 entries for each excluded path,
extracted ./play version reports "play! 1.11.12" and exits 0.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>