Play Framework

chore: check shell scripts out with LF on every platform

The repo had no .gitattributes, so Git for Windows checked every text
file out with CRLF. bash rejects a CRLF script, and bundle-play.sh is a
classpath resource the plugin bakes into every bundle: a plugin built
from a Windows checkout would have shipped a launcher that cannot run.
It is also why the launcher's tests could not run there (PF-183).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KDUoh3KhBpfjXn4rV6H356