feat(cfg): add support for wrap with abbreviation

feat(cfg): move custom plugins to a separate file
feat(cfg): uncomment kickstart plugins

lua/custom/plugins/nvim-emmet.lua

@@ -0,0 +1,7 @@
+return {
+    "olrtg/nvim-emmet",
+
+    config = function()
+        vim.keymap.set({ "n", "v" }, '<leader>xe', require('nvim-emmet').wrap_with_abbreviation)
+    end,
+}