feat(nvim): add snippet for adding vim plugins

lua/opdavies/snippets/ft/nix.lua

@@ -0,0 +1,23 @@
+local fmta = require("luasnip.extras.fmt").fmta
+local ls = require "luasnip"
+
+local c = ls.choice_node
+local i = ls.insert_node
+local t = ls.text_node
+
+local M = {
+  vimplugin = fmta(
+    [[
+    {
+      plugin = <>.<>;
+      type = "lua";
+      config = ''
+        <>
+      '';
+    }<>
+    ]],
+    { c(1, { t "vimPlugin", t "customVim" }), i(2), i(3), i(0) }
+  ),
+}
+
+return M