Create interface files

As this plugin is for neovim AND vim, I don't know, how to manage it.
So maybe just for everyones interest, I created a function (for neovim) to automatically create resi files:

function createInterfaceFile()
    local path = vim.api.nvim_buf_get_name(0)

    if vim.fn.filereadable(path .. "i") == 1 then
        print("Interface file already exists")
    else
        -- print("Create interface file")

        vim.lsp.buf_request(
          0, 
          "textDocument/createInterface", 
          { uri = "file://" .. path }, 
          function ()
            print("Interface file created")
          end
        )
    end
end

vim.cmd("command RescriptCreateInterfaceFile lua createInterfaceFile()")

Start with the proposed createInterfaceFile function and its RescriptCreateInterfaceFile command, then determine how interface-file creation should work for both Neovim and Vim. Done means the supported editor behavior and handling for an existing interface file are clearly defined and implemented.