feat: configure navic and integrate with lualine + update flake update action (#11)

Configured Navic and integrated it with Lualine. This provides context
about the code that is being worked on.

Also added a PAT to be able to create a PR when the Flake Update Github
action runs.

config/plugins/ui/lualine.nix

@@ -3,6 +3,7 @@ _: {
     enable = true;
     globalstatus = true;
     extensions = [
+      "fzf"
       "neo-tree"
     ];
     disabledFiletypes = {
@@ -53,10 +54,13 @@ _: {
         }
       ];
       lualine_x = [
+        {
+          name = "navic";
+        }
         {
           name = "diff";
           extraConfig = {
-            symbos = {
+            symbols = {
               added = " ";
               modified = " ";
               removed = " ";