[js2]

Snap left/right and maximize are actually built-in by using "Tile Window to Left of Screen" and "Tile Window to Right of Screen" from either the Window menu or option-clicking the green window button:

https://appleinsider.com/articles/21/12/04/how-to-speed-up-w...

There aren't built-in keyboard shortcuts, but you can add a keyboard shortcut for any menu item, including these:

https://support.apple.com/guide/mac-help/create-keyboard-sho...

There's a preference to make double-clicking the window titlebar fill the screen instead of minimizing. And you can add a keyboard shortcut for this too:

https://apple.stackexchange.com/questions/372719/maximize-wi...