[love-api] many callback functions are missing

[lua-rocks]

These functions are undefined:

• love.load
• love.quit
• love.errorhandler
• love.lowmemory
• love.threaderror
• love.keyreleased
• love.textedited
• love.textinput
• other mouse, joystick and touch related...

I really don't understand why the api has all these aliases, but in vscode these functions appear as undefined 🤷.

Maybe @alias is a wrong way to define class fields or is the total number of possible class fields limited?

For some reason, some of them show up, but most do not!

[sumneko]

These functions should be implemented by user.
However this server dose not support ---@override for now, so you can only use ---@type to get infers

[musjj]

Now that #2158 is merged, what's the better way to express these types?