added CI for MinGW

[RohanKrMahato]

Added CI for MinGW

While testing the MinGW_build_support, we needed CI to check if the implementation was correct.

Type of change

• New feature (non-breaking change which adds functionality)

[viferga]

@RohanKrMahato you created the PR again but it's the same code as before, I can't see the build matrix..

[viferga]

I am leaving this here for reference: https://github.com/msys2/setup-msys2/blob/main/examples/cmake.yml

[RohanKrMahato]

@viferga I was testing on my local machine and different branch on the forked repo. I will push here, a little bit of work remaining :)

[RohanKrMahato]

@viferga

Added all the combination of Release and Debug, also added the Ctest in the Latest commit ... Sir, I have changed the shell from Msys2 shell to Cmd and it is now working fine (I mean, it is building till the function pointer error, which indicates, after this we need to add the cases for MinGW in the Metacall Core).

D:\a\core\core\source\loaders\ext_loader\source\ext_loader_impl.cpp:355:37: error: invalid 'static_cast' from type 'dynlink_symbol_addr' {aka 'void (*)()'} to type 'void*'
  355 |                 function_cast.ptr = static_cast<void *>(ext.addr);
      |                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[RohanKrMahato]

@viferga Sir, I'm sorry for the last comment, but what I noticed that changing the default Shell can have consequences, actually what was happening ( and why i thought it was working ) was that the cmd for all the test in Msys2 environment was taking the same compiler.

Note: Now I changed the Default shell to Msys2 however now Clang64 is working fine, but not MinGW 64,32 & Ucrt64 (it is giving the following error, may be it is because of the strict type conversion feature of compiler).

I'm attaching the error with MinGW64, (Ucrt also giving the similar error)

types]
  134 |                 NULL, 1, 0, (LPTSTR *)lpt_str, NULL);
      |                             ^~~~~~~~~~~~~~~~~
      |                             |
      |                             CHAR ** {aka char **}
In file included from D:/a/_temp/msys64/mingw64/include/windows.h:70,
                 from D:\a\core\core\source\log\source\log_policy_stream_syslog.c:23:
D:/a/_temp/msys64/mingw64/include/winbase.h:2578:165: note: expected 'const CHAR **' {aka 'const char **'} but argument is of type 'CHAR **' {aka 'char **'}
 2578 |   WINADVAPI WINBOOL WINAPI ReportEventA (HANDLE hEventLog, WORD wType, WORD wCategory, DWORD dwEventID, PSID lpUserSid, WORD wNumStrings, DWORD dwDataSize, LPCSTR *lpStrings, LPVOID lpRawData);
      |                                                                                                                                                             ~~~~~~~~^~~~~~~~~
mingw32-make[2]: *** [source\log\CMakeFiles\log.dir\build.make:469: source/log/CMakeFiles/log.dir/source/log_policy_stream_syslog.c.obj] Error 1
mingw32-make[1]: *** [CMakeFiles\Makefile2:5501: source/log/CMakeFiles/log.dir/all] Error 2
mingw32-make: *** [Makefile:155: all] Error 2