feat(jsx): add jsx generator

[avivkeller]

This PR introduces a jsx generator that transforms Markdown AST and metadata entries into a JSX (recma) AST (with a root of Program), which can then be compiled by the react-web generator from #7.

The JSX generator produces AST that assumes that all the components in #10 (comment) have been implemented.

As of 5/26/25, the generated AST is: https://aviv.sh/hostables/nodejs/1748274862-jsx-ast.json

[AugustinMauroy]

Interesting basic, don't miss to add some test

[avivkeller]

I'm working on skipping the MDX and going to straight to JSX, so I'll add lots of tests when that's started

[avivkeller]

This uses pnpm for now, see #236 for reference. If we do adopt pnpm, it would be a seperate PR, this is just for development.

[ovflowd]

I've left a final round of comments; After that LGTM. But only approving the PR once the git-deps issue is addressed (either by the upstream npm publish or incorporating git-deps on @.pkgjs/@.nodejs)

[AugustinMauroy]

maybe add little bit more test

This review was specific to a security concern, which has since been resolved.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 81.35048% with 116 lines in your changes missing coverage. Please review.

Project coverage is 90.55%. Comparing base (37c3202) to head (8d1496c).

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/generators/jsx-ast/utils/buildContent.mjs	59.09%	81 Missing ⚠️
src/utils/remark.mjs	50.00%	13 Missing ⚠️
src/generators/jsx-ast/utils/transformer.mjs	57.69%	11 Missing ⚠️
src/utils/generators.mjs	75.75%	8 Missing ⚠️
src/generators/jsx-ast/utils/buildBarProps.mjs	96.22%	2 Missing ⚠️
src/generators/jsx-ast/utils/ast.mjs	98.73%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #273      +/-   ##
==========================================
- Coverage   91.88%   90.55%   -1.34%     
==========================================
  Files          56       63       +7     
  Lines        4142     4754     +612     
  Branches      174      191      +17     
==========================================
+ Hits         3806     4305     +499     
- Misses        334      446     +112     
- Partials        2        3       +1     

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