Plugin: Create your own Modal keybindings or use vim like buildin defaults

[MLFlexer]

Hello everyone,
I saw the post #2710 and wanted to add some extra features. However wezmode is in typescript, and I like lua, so I decided to create my own take on the modal keybindings.

The plugin currently enables you to just use the default modes or easily create your own modes. The default modes are not loaded unless you explicitly enable them, and thus they should not make your config any slower if you are not using them 😄

Right now there are 3 main default modes, Copy, UI and Scroll mode, and Copy mode has 2 sub-modes which are visual and search mode.

Feel free to create any issues or PRs with new your own modes or stuff you would like to see changed 😄