fix: prevent LaTeX parsing inside link text

[mikkihugo]

This PR fixes parsing of links with dollar signs in the text or URL.

Fixes #206

Problem

When parsing links with dollar signs, like:

[$NVIM_APPNAME](https://neovim.io/doc/user/starting.html#$NVIM_APPNAME)

The parser incorrectly interpreted $ inside link text as the start of a LaTeX block, preventing the link from being parsed correctly.

Root Cause

The _inline_base grammar rule included $.latex_block, which was used in ALL inline contexts including inside link text (_inline_element_no_link).

Solution

Created a new _inline_base_no_latex rule that excludes LaTeX blocks, and modified the dynamic rule generation to use this variant when generating _inline_element_no_link rules (used inside link text).

Changes:

• Added _inline_base_no_latex rule without $.latex_block
• Modified dynamic rule generation (line 401) to use appropriate base rule based on context:
  • Inside links (link=false → _no_link suffix): Use _inline_base_no_latex
  • Outside links (link=true): Use _inline_base (with LaTeX)

Testing

✅ All existing tests pass
✅ Links with $ characters now parse correctly as links
✅ LaTeX still works correctly outside of link text

Example

Before: Link not recognized, $NVIM parsed as LaTeX start
After: Entire [$NVIM_APPNAME](...) parsed as a link

Additional Changes

Also upgraded to tree-sitter 0.25 to match latest ABI:

• Updated Cargo.toml dependencies (0.24 → 0.25)
• Updated parser.rs API calls (parse_with → parse_with_options)
• Fixed lifetime elision warning in walk() method

This keeps the codebase compatible with the latest tree-sitter ecosystem.