Better format and static type Player Body

[mubinulhaque]

In accordance with style guide given here:

• Remove space between variable names and colons whenever types must be specified
• Remove types whenever inferring is possible
• Reorder functions in accordance with the style guide above
• Clarify comments of variables and methods
• Format multiline statements for better readability
• Add suffixes to five export variables
• Add return types to eleven methods
• Add types to signal parameters
• Add type to Dictionary and Array
• Add BBCode to class doc
• Replace exclamation marks with not keyword
• Add types to for loop variables
• Replace emit(signal, Callable) with signal.emit(Callable)

Testing

The Main Menu scene and the Basic Movement demo had no issues not present in master.

Disclaimer

No generative AI was used to enhance or create the code given here.

[BastiaanOlij]

CI is still failing on a two long line issue.

[mubinulhaque]

Considering how long this script is, would it be fine to add a gdlint-ignore for this, or should I try to shorten it?