Switch to new lazy-based config

Still a bit WIP. Gradually adding back old plugins and config from old config.

lua/plugins/ssr.lua

@@ -0,0 +1,13 @@
+return {
+  "cshuaimin/ssr.nvim",
+  keys = {
+    {
+      "<leader>sR",
+      function()
+        require("ssr").open()
+      end,
+      mode = { "n", "x" },
+      desc = "Structural Replace",
+    },
+  },
+}