Play Framework

chore: drop support/vim + textmate fossils (PF-91)

The bundled snipMate snippets and Textmate bundle haven't been
shippable in this fork for years — `support/textmate/` doesn't even
exist on disk, so the `<target name="support">` Ant task silently
produced an empty zip. Dropping all of it:

- delete support/vim/{html,java}.snippets and the .gitignore entry
  for support/textmate
- remove the `<target name="support">` block and the
  `support/textmate/**` exclude from framework/build.xml
- delete the textmate + vim/snipMate sections from
  documentation/manual{,_ja}/ide.textile (vim users are still
  covered by the "Other IDEs and editors" catch-all that follows)
- replace the dead `txmt://` example for play.editor with the
  IntelliJ `idea://` scheme in configuration.textile (×2) and
  application-skel; play.editor itself remains a real feature
  (framework/src/play/utils/Utils.java:86)

Casual prose mentions of Textmate as an example text editor are
left alone — they are not artifact references.

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