fix: Improve syntax highlighting for multi-line self-closing JSX tags…

[Hushan-10]

Summary

Fix Jac syntax highlighting for multi-line self-closing JSX-style tags, and add regression coverage.

Issue

Multi-line self-closing tags (example: <EmailBuddyLayout ... /> split across lines) were not tokenized correctly, causing incorrect scopes and broken highlighting.

Fix

Update the Jac TextMate grammar to recognize /> as a valid tag terminator for both component tags and HTML tags, then add tests and a small example to prevent regressions.

Changes

• syntaxes/jac.tmLanguage.json
  • Improved JSX/HTML tag patterns to support self-closing tags (including multi-line forms).
• src/__tests__/inspectTokenScopes.test.ts
  • Added tests for multi-line self-closing component tag token scopes.
• examples/app.jac
  • Added a minimal example that uses a multi-line self-closing component tag.

Testing

• Added/updated unit tests for token scope inspection.