Support brackets and nesting in pub use (such as pub use a::{b, x::{y,z}})

[fzyzcjy]

Changes

Close #2102

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 99.49495% with 1 line in your changes missing coverage. Please review.

Project coverage is 99.12%. Comparing base (3ed6c2f) to head (5276508).

Files	Patch %	Lines
...odegen/parser/mir/parser/function/real/argument.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           master    #2120    +/-   ##
========================================
  Coverage   99.11%   99.12%            
========================================
  Files         486      486            
  Lines       19656    19762   +106     
========================================
+ Hits        19482    19589   +107     
+ Misses        174      173     -1     

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