binfmt/elf: support ELF debugging with separation of source code and debugging information.

[LevelCA]

Summary

Obtain ELF related information when loading and unloading ELF, update the module information in the loadable_module_descriptor type array through loadable_module_create and loadable_module_destroy, and the local PC loads the elf debugging letter through the python gdb script for remote debugging.

Impact

binfmt elf lod and unload process.

Testing

[acassis]

Amazing @LevelCA you created a great documentation! That is something we need most! Kudos!

BTW, in the diagram I suggest you to replace the name Vela with NuttX Board because otherwise people could think it only works on Vela

[acassis]

@LevelCA please fix this error:

Warning, treated as error:
/home/runner/work/nuttx/nuttx/Documentation/components/binfmt.rst:414:Error in declarator or parameters
Invalid C declaration: Expected identifier in nested name. [error at 70]
  bool loadable_module_create(const char *symfile_name, void *text_addr,
  ----------------------------------------------------------------------^
make: *** [Makefile:47: html] Error 2
Error: Process completed with exit code 2.

[LevelCA]

@acassis Thank you very much for your suggestions, I will submit the latest changes later.

[LevelCA]

@acassis This commit depends on another PR. After it is merged, I will update the latest commit.