General Update and Prepare Feature Support

[RadWolfie]

Some modifications have been made to either improve the code or add planned feature support.

• Add TEST_SKIP_OPT and TEST_SKIP_END macros for future feature support.
  • TEST_SKIP_OPT is intended for scenarios where a portion of the tests cannot be executed due to certain conditions.
  • TEST_SKIP_END is intended for scenarios where entire tests cannot be executed under certain conditions, such as when a retail kernel does not export every symbol while a dev/debug kit does.
• Add an nxdk_patch header file for changes that need to be upstreamed. It is best to document what is missing from the nxdk repository here, then submit pull requests upstream to update the nxdk repository.
• Improve the TEST_END macro by integrating a return statement, removing the need for redundant return statements in individual tests.
• Improve the Makefile by:
  • Scanning the .c files only once instead of repeatedly scanning for every file compilation.
  • Fetching the Git version once rather than during every single file compilation.
  • Setting the compilation flags once so they do not repeat for every file compilation.
  • Minor formatting adjustments for better readability.
• Fix various coding format mistakes discovered along the way.
• Pulled a couple of PatrickvL's commits from Flesh out tests for all 379 API's #112 pull request:
  • Cherry-picked update device dummy comment.
  • Cherry-picked modified macro argument parenthesization.

[RadWolfie]

Marked as a draft pull request for any review remarks that need to be changed or for any additional changes required.

The configuration variable changes will be created in a separate pull request in the future.