feat(config): add template.nvim plugin for Snacks picker

lua/plugins/template.lua

@@ -0,0 +1,14 @@
+--- template.nvim: insert file templates with {{_expr_}} grammar
+--- Templates live in <config>/templates/<ft>/*.ext and are matched to the
+--- buffer by filetype. Picker frontend lives in config.templates (<C-f>t).
+--- @module plugins.template
+
+return {
+  "nvimdev/template.nvim",
+  cmd = "Template",
+  opts = {
+    temp_dir = vim.fn.stdpath "config" .. "/templates",
+    author = "Prad Nukala",
+    email = "prad@sonr.io",
+  },
+}