chore(nix): remove 'pre-commit-hooks.nix' in favor of the code being in 'flake.nix'

Author: jh-devv

flake.nix

@@ -16,14 +16,25 @@
       systems = ["x86_64-linux"];
 
       imports = [
-        ./pre-commit-hooks.nix
+        inputs.pre-commit-hooks.flakeModule
       ];
 
       perSystem = {
         config,
         pkgs,
         ...
       }: {
+        pre-commit = {
+          settings.excludes = ["flake.lock"];
+
+          settings = {
+            hooks = {
+              alejandra.enable = true;
+              yamllint.enable = true;
+              markdownlint.enable = true;
+            };
+          };
+        };
         devShells.default = pkgs.mkShell {
           packages = [
             pkgs.alejandra