Better format and static type Grapple

[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
• Add return type to five functions
• Reorder functions in accordance with the style guide above
• Format multiline statements for better readability
• Clarify comments of variables and methods
• Add suffixes to three exported variables
• Replace exclamation marks with not keyword
• Replace connect(signal, Callable) with signal.connect(Callable)

Testing

The Grappling demo had no issues not present in master.

Disclaimer

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