Improve pub use parsing and trait definition parsing in third party crates

[fzyzcjy]

Changes

Please list issues fixed by this PR here, using format "Fixes #the-issue-number".

Checklist

• An issue to be fixed by this PR is listed above.
• New tests are added to ensure new features are working. Please refer to this page to see how to add a test.
• ./frb_internal precommit --mode slow (or fast) is run (it internal runs code generator, does auto formatting, etc).
• If this PR adds/changes features, documentations (in the ./website folder) are updated.
• CI is passing. Please refer to this page to see how to solve a failed CI.

Remark for PR creator

• ./frb_internal --help shows utilities for development.
• If fzyzcjy does not reply for a few days, maybe he just did not see it, so please ping him.

[codecov]

Codecov Report

Attention: Patch coverage is 29.06977% with 61 lines in your changes missing coverage. Please review.

Project coverage is 97.40%. Comparing base (67ac654) to head (6821c19).

Files	Patch %	Lines
...ser/hir/hierarchical/module/pub_use_transformer.rs	6.12%	46 Missing ⚠️
.../src/library/codegen/ir/hir/hierarchical/traits.rs	60.00%	6 Missing ⚠️
...rc/library/codegen/ir/hir/hierarchical/function.rs	25.00%	3 Missing ⚠️
...rary/codegen/ir/hir/hierarchical/struct_or_enum.rs	0.00%	3 Missing ⚠️
frb_codegen/src/library/utils/namespace.rs	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2025      +/-   ##
==========================================
- Coverage   97.93%   97.40%   -0.54%     
==========================================
  Files         419      419              
  Lines       17006    17047      +41     
==========================================
- Hits        16655    16604      -51     
- Misses        351      443      +92     

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