initial app add

Signed-off-by: ahuston-0 <aliceghuston@gmail.com>

checks.nix

@@ -0,0 +1,58 @@
+{
+  inputs,
+  system,
+  formatter,
+  ...
+}:
+ {
+  pre-commit-check = inputs.pre-commit-hooks.lib.${system}.run {
+    src = ./.;
+    hooks = {
+      # nix checks
+      # Example custom hook for nix formatting
+      fmt-check = {
+        enable = true;
+
+        # The command to execute (mandatory):
+        entry = "${formatter}/bin/nixfmt --check";
+
+        # The pattern of files to run on (default: "" (all))
+        # see also https://pre-commit.com/#hooks-files
+        files = "\\.nix$";
+      };
+      ## static analysis checks for nix
+      nil.enable = true;
+      statix.enable = true;
+      deadnix = {
+        enable = true;
+        settings = {
+          noUnderscore = true; # ignore variables starting with underscore
+          # ignore lambda patterns (useful for passing args from ({}@args)
+          # to other functions)
+          noLambdaPatternNames = true;
+        };
+      };
+
+      # json hooks
+      check-json = {
+        enable = true;
+        # exclude vscode json files as they allow comments and check-json doesn't
+        excludes = [ "settings.json$" ];
+      };
+
+      # toml hooks
+      check-toml.enable = true;
+
+      # git hooks
+      check-merge-conflicts.enable = true;
+      ## prevents committing to main
+      no-commit-to-branch.enable = true;
+
+      # misc hooks
+      check-added-large-files.enable = true;
+      ## prevents two similarly named files for case sensitive systems
+      check-case-conflicts.enable = true;
+      detect-private-keys.enable = true;
+    };
+  };
+}