Play Framework

chore: prune .gitignore rules for paths removed in PF-90 (PF-91)

Remove 17 lines pointing at paths that don't exist on disk and
aren't created by any current build target:

- framework/.idea (covered by `.idea` later in file)
- framework/play.jar (output is `framework/play-*.jar`)
- framework/src/version (only `framework/src/play/version` exists,
  which Ant `jar` writes — that line is kept)
- framework/tests/test-application/db (no `framework/tests/` at all;
  current test app is `framework/test-src/integration/testapp/`)
- framework/docs (Ant javadoc writes to `documentation/api`,
  which is kept)
- framework/ecClasses (Eclipse-compiler artifact, never created)
- nbproject/{genfiles.properties,jdk.xml,nbjdk.properties,
  nbjdk.xml,private} + the bare `nbproject` line (NetBeans IDE; no
  nbproject/ anywhere — fork is IntelliJ-only per PF-90)
- resources/catalog.xml, resources/nbproject/private, catalog.xml
  (pre-Gradle resource scaffolding)
- *.pyc, __pycache__/ (Python CLI was purged in 602fe0305)

Note: PF-91's original audit also flagged `framework/tests-results`,
`framework/tests-tmp`, and `documentation/api` — all kept. Ant
build.xml still creates them during unittest/integration-test runs
(lines 35-36, 258, 304-305) and javadoc (line 75 destdir).

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