PermissionError ... cannot access the file because it is being used by another process: on Windows

[engineerjoe440]

While running with the configuration shown in #26, additional Windows-related permission issues were found:

λ rich-codex --skip-git-checks
INFO     rich-codex ⚡️📖⚡️ version 1.2.1
INFO     Found 1 config file
INFO     Searching 1 files
╭──────────────────────────────┬──────────────────────────╮
│ Commands to run:             │                   Source │
├──────────────────────────────┼──────────────────────────┤
│ git-rtac compile --help      │  docs\img\rich-codex.yml │
│ git-rtac dependencies --help │  docs\img\rich-codex.yml │
│ git-rtac export --help       │  docs\img\rich-codex.yml │
│ git-rtac help                │  docs\img\rich-codex.yml │
│ git-rtac import --help       │  docs\img\rich-codex.yml │
│ git-rtac info --help         │  docs\img\rich-codex.yml │
╰──────────────────────────────┴──────────────────────────╯
Do you want to run these commands? (All / Some / None) [a/s/n]: a
INFO     Running all commands
Traceback (most recent call last):
  File "C:\Users\joestan\AppData\Local\Programs\Python\Python39\lib\runpy.py", line 197, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "C:\Users\joestan\AppData\Local\Programs\Python\Python39\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "C:\Users\joestan\AppData\Local\Programs\Python\Python39\Scripts\rich-codex.exe\__main__.py", line 7, in <module>
  File "C:\Users\joestan\AppData\Local\Programs\Python\Python39\lib\site-packages\click\core.py", line 1130, in __call__
    return self.main(*args, **kwargs)
  File "C:\Users\joestan\AppData\Local\Programs\Python\Python39\lib\site-packages\rich_click\rich_command.py", line 19, in main
    rv = super().main(*args, standalone_mode=False, **kwargs)
  File "C:\Users\joestan\AppData\Local\Programs\Python\Python39\lib\site-packages\click\core.py", line 1055, in main
    rv = self.invoke(ctx)
  File "C:\Users\joestan\AppData\Local\Programs\Python\Python39\lib\site-packages\click\core.py", line 1404, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "C:\Users\joestan\AppData\Local\Programs\Python\Python39\lib\site-packages\click\core.py", line 760, in invoke
    return __callback(*args, **kwargs)
  File "C:\Users\joestan\Documents\(Other) Python Projects\rich-codex\src\rich_codex\cli.py", line 455, in main
    codex_obj.save_all_images()
  File "C:\Users\joestan\Documents\(Other) Python Projects\rich-codex\src\rich_codex\codex_search.py", line 410, in save_all_images
    img_obj.save_images()
  File "C:\Users\joestan\Documents\(Other) Python Projects\rich-codex\src\rich_codex\rich_img.py", line 577, in save_images
    tmp_path.unlink()
  File "C:\Users\joestan\AppData\Local\Programs\Python\Python39\lib\pathlib.py", line 1343, in unlink
    self._accessor.unlink(self)
PermissionError: [WinError 32] The process cannot access the file because it is being used by another process: 'C:\\Users\\joestan\\AppData\\Local\\Temp\\tmpue80aezp'

Suspected Cause:

After a little digging around, it seems that this is related to some behavior between Windows and mkstemp: https://stackoverflow.com/a/34717110/10406011

Suggested Resolution:

Thus, it seems like we just need to do an os.close(...) to handle closing the file before removing it. I've got a development branch to try tackling this, and I'll open a PR for your review very shortly! :)