chore(vim): Converted some config and remapping to lua

.config/nvim/lua/null/remap.lua

@@ -0,0 +1,23 @@
+-- Loaded by `null.config`
+local remap = function(mode, key, target, opts)
+    vim.api.nvim_set_keymap(mode, key, target, opts or {
+	    noremap = true,
+	    silent = true,
+    })
+end
+
+-- Map Ctrl+U as U so it can be used as redo
+remap("n", "<C-u>", "U")
+-- Map U as redo
+remap("n", "U", "<C-r>")
+
+-- Yank and Put
+remap("n", "<C-y>", '"+y')
+remap("n", "<C-p>", '"+p')
+remap("n", "<C-Y>", '"+y')
+remap("n", "<C-P>", '"+p')
+
+-- Comment a line like how it is on VSC (using vim-commentary)
+remap("n", "<C-/>", "gcc", { noremap = false })
+remap("v", "<C-/>", "gc", { noremap = false })
+remap("i", "<C-/>", "<esc>gcc", { noremap = false })