feat: produce comment and context in transform output

[timofei-iatsenko]

This is a follow up for #193

Related #190

I found that original implementation doesn't produce context and comment fields (because it was never supposed to be used with extractor, so that was a simplicfication i made), so the result of swc plugin transformation could not be directly used with lingui extractor as user wanted.

This adds this functionality and make it behave closer to the js version - in fact, exactly as a js version.

fyi @karmeleon

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.69%. Comparing base (c7e02bc) to head (a3c35e8).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #201      +/-   ##
==========================================
+ Coverage   92.61%   92.69%   +0.08%     
==========================================
  Files           8        8              
  Lines        1448     1465      +17     
==========================================
+ Hits         1341     1358      +17     
  Misses        107      107              

Flag	Coverage Δ
unittests	92.69% <100.00%> (+0.08%)	⬆️

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Files with missing lines	Coverage Δ
src/js_macro_folder.rs	97.82% <100.00%> (+0.12%)	⬆️
src/lib.rs	91.90% <100.00%> (+0.13%)	⬆️

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