Folder settings tweaks

[GreatGreenStar]

No description provided.

[GreatGreenStar]

These are some basic tweaks, basically what they do is:
Recommend the WPILIB extensions if not installed which should be a good heads-up if someone accidentally opens with normal vs-code.
Integrate a tad better with vscode built-in-formatting, through the redhat java extension used in wpilib vscode then setting its formatting rules to our own based off relative file path.
Required files to have no errors to autosave.
Autosaves after 10 seconds so long as above condition is met.
Slight whitespace handling tweaks for start and end of files
Fetch (not pull) runs against CURRENT branch every 3 minutes.
Main gives an additional warning if attempted to be pushed directly to, however this is a "are you sure" type warning so you can say yes if admin still.
Manual saves format files too.

[GreatGreenStar]

Just to clarify, though settings in vscode does, while code WILL format on save... autosave does not trigger formatting, only saving through other means like ctrl+s or building will. (though build already does)

[GreatGreenStar]

After testing, it does in fact use it as formatter path properly.
Thus this setup should effectively guarantee code being formatted, reduce chances of people being out of date with main and ensure that people's code is saved at last error-free version automatically. (Doesn't interfere with manual saving even if there's errors.)
ALSO this will mitigate VSCode asking "do you want to automatically always x".