Draft: DirectoryManager

Please check the following before asking for a review:

• All the modified code is covered.
• Docstrings reflect the code changes.
• Type hints reflect the code changes
• Add a changelog fragment for all user visible changes.

TODO:

• Create a new class for the BackupSettings of the directory manager without erase, load, plot, and the filepath is only a file name (string).
• Remove exists_ok and explain the behavior on the documentation.
• Add an expected fail on the BCD tests on Windows due to the size of the paths.
• Add a mechanism on the DiscFromExe to use the directory manager instead of the directory creator and add tests.
• Check test assertions after the latest rebase.