Accustom mult to further dev usage

[tainn]

Includes multiple changes towards the create_new_plugin root python script.

Consists of:

• Adhering to the PEP-8 guidelines
• Avoiding the shadowing of in-built keywords (str, dir)
• Avoiding shadowing of global variables outside of the function's scope (strfun)
• Replacing comparison with None being performed with equality operators; this change also increases performance
• Preventing potential of undefined names (infi)

Overall, this change slightly improves performance and alleviates bad practices -- such as undesired overshadowing -- allowing for safer continuation should the script see further development.

[runelite-github-app[bot]]

Includes non-plugin changes

[Nightfirecat]

An alternative which uses yapf formatting (matches https://github.com/runelite/runelite-wiki-scraper) and incorporates only the equality operator change is https://github.com/Nightfirecat/plugin-hub/commits/python-cleanup I don't have strong feelings on this either way