Debug: fix struct vars debug, params modication, supports expressions, lexical scope/lifecycle

[cpunion]

• Supports full types
  • Struct params/vars modification
  • Basic type params modification
    • discuz:
      • https://stackoverflow.com/questions/79023513/whats-wrong-in-my-generated-debug-info-in-llvm-ir
      • https://chat.stackoverflow.com/rooms/258538/discussion-between-jmmartinez-and-jacky-lee
      • just use simple rules, and ignore discarded debug info of clang
  • Return types (including tuples)
  • Fix pointer type size
  • types.Named -> Typedef
• Scope
  • Lexical scope (if, for, closure)
  • Variable lifecycle
• Go expressions
  • p *(s.pf).a
  • p s.pf.a

[codecov]

Codecov Report

Attention: Patch coverage is 98.22222% with 4 lines in your changes missing coverage. Please review.

Project coverage is 97.45%. Comparing base (5dadf9a) to head (227dda3).
Report is 100 commits behind head on main.

Files with missing lines	Patch %	Lines
ssa/eh.go	0.00%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #806      +/-   ##
==========================================
- Coverage   97.58%   97.45%   -0.13%     
==========================================
  Files          20       20              
  Lines        5169     5273     +104     
==========================================
+ Hits         5044     5139      +95     
- Misses        106      111       +5     
- Partials       19       23       +4     

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