llcppg:refactor by preprocess

[luoliwoshang]

clang -E -nobuiltininc keep same search path in libclang & clang

ensuring:
1.Correct type dependency relationships
2.Declaration nodes in proper file locations

• libxml2
• libxslt
• raylib
• sqlite
• zlib
• lua
• gpgerror
• gmp
• gettext
• cjson
• z3

solutions

1. Combine all the header files declared in the configuration files into a single header file, and use clang -E with the corresponding cflags to preprocess and obtain the preprocessed file.
2. Process the preprocessed nodes using libclang.

question

1. The file path parsed by libclang is inconsistent with the header files used by clang -E

• By setting -resource-dir, ensure that both libclang and clang use the same directory during parsing.

2. libclang 的 clang_Location_isInSystemHeader api 并不能区分一个安装在/usr/include/sqlite.h 和 /usr/include/stdio.h 是标准库还是三方库

• 预期通过clang引用所有标准头文件去动态维护系统头文件表

refine

• avoid recollect node by combine file
  even like havent macro define avoid reinclude

#include "impl.h"
typedef struct foo foo;
struct bar {
    foo *a;
};

impl.h

struct foo {
    long a;
};

// Forward declaration of sqlite3_file
struct sqlite3_file;
#endif

[codecov]

Codecov Report

Attention: Patch coverage is 70.55215% with 48 lines in your changes missing coverage. Please review.

Project coverage is 96.03%. Comparing base (dec9001) to head (3ce4540).
Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
cmd/gogensig/convert/convert.go	76.22%	22 Missing and 7 partials ⚠️
cmd/gogensig/unmarshal/unmarshal.go	64.00%	6 Missing and 3 partials ⚠️
cmd/gogensig/convert/package.go	0.00%	6 Missing ⚠️
cmd/gogensig/config/conf.go	60.00%	3 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #164      +/-   ##
==========================================
- Coverage   98.41%   96.03%   -2.39%     
==========================================
  Files          17       17              
  Lines        2337     2494     +157     
==========================================
+ Hits         2300     2395      +95     
- Misses         26       74      +48     
- Partials       11       25      +14     

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