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

[cpunion]

• [x] Supports full types
  • [x] Struct params/vars modification
  • [x] 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
  • [x] Return types (including tuples)
  • [x] Fix pointer type size
  • [x] types.Named -> Typedef
• [x] Scope
  • [x] Lexical scope (if, for, closure)
  • [x] Variable lifecycle
• [x] Go expressions
  • [x] p *(s.pf).a
  • [x] p s.pf.a

[codecov[bot]]

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 192 commits behind head on main.

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

Additional details and impacted files

```diff @@ 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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