feat: add filename formatter Shell script

[Panquesito7]

Things added/changed:

• Add a Shell filename formatter script. The script lets you:
  • Choose the desired base directory.
  • Choose between two file types (e.g.: *.cpp, *.hpp).
  • Ignore files and directories to not be checked (filenames do not need to include directories as all directories are checked if they have the same filename).
  • Why add it here? It's already being used in various repositories such as the C/C++, Julia, TypeScript, and hopefully more repositories.

I'm not a Shell expert, so if you have any improvements that can be done, let me know. Thanks. 🙂 CC: @uncomfyhalomacro, you might want to check this as you're better with Shell scripts.

[Panquesito7]

Looks good to me!

Have you considered making these scripts as a GitHub action? That way they would be simply a workflow file with some configuration to tell it which ones to execute...

That sounds like a good idea! I'll be making one for the Filename Formatter later on. For now, let's keep this as-is.

[Panquesito7]

Will be merging for now. This will make various workflows much shorter.