This is an experiment which adds a builtin plugin containing a custom Lisp interpreter.

The problem I'm trying to solve is the fact that right now, creating custom commands or keybindings which do more than run one
builtin command, is a lot of overhead right now. You have to:

• Install a compatible Nim compiler
• Install a compatible Emscripten version
• Create a custom plugin.nim and compile it to WASM

This is a lot of work for just creating a custom keybinding to do something a bit more complex.

With this plugin you can:

    "vim.normal": {
        "<LEADER>f": ["eval-file", "app://config/custom.lisp"], // run entire file
        "<LEADER>s": ["eval-selection"], // eval selected text as lisp
        "<LEADER>e": ["leval", "(: .set-mode 'vim.insert)"], // bind command to lisp code
                                 // which in this case runs `.set-mode "vim.insert"`
                                 // (`:` means run the first argument as a command and pass remaining arguments.)
    },

This does not replace the WASM plugins completetly, "bigger" or more performance sensitive things should still be a WASM plugin for performance reasons.