refactor: resolve warnings/errors in checks

dots/.config/nvim/flake.nix

@@ -37,7 +37,6 @@
 
   outputs =
     {
-      self,
       nixpkgs,
       nixCats,
       ...
@@ -50,7 +49,7 @@
 
       mkDependencyOverlays = system: [
         (utils.standardPluginOverlay inputs)
-        (final: prev: {
+        (_final: _prev: {
           mcp-hub = inputs.mcp-hub.packages.${system}.default;
         })
       ];

dots/.config/nvim/lua/skeleton/init.lua

@@ -2,10 +2,10 @@ local autocmd = vim.api.nvim_create_autocmd
 
 autocmd("BufNewFile", {
   pattern = "shell.nix",
-  command = "0r ~/.config/nvim/skeletons/shell.nix",
+  command = "0r ~/.config/nvim/skeletons/shell.nix.skeleton",
 })
 
 autocmd("BufNewFile", {
   pattern = "flake.nix",
-  command = "0r ~/.config/nvim/skeletons/flake.nix",
+  command = "0r ~/.config/nvim/skeletons/flake.nix.skeleton",
 })