chore(dev): move nix flake to top level, add api tooling

.gitignore

@@ -28,3 +28,4 @@ vendor/
 os-packages/
 mage_output_file.go
 mage-static
+.direnv/

flake.nix

@@ -0,0 +1,18 @@
+{
+  description = "Vikunja dev environment";
+
+  outputs = { self, nixpkgs }:
+    let pkgs = nixpkgs.legacyPackages.x86_64-linux;
+    in {
+      defaultPackage.x86_64-linux =
+        pkgs.mkShell { buildInputs = with pkgs; [
+          # General tools
+          git-cliff 
+          # Frontend tools
+          nodePackages.pnpm cypress 
+          # API tools
+          go golangci-lint mage
+        ]; 
+      };
+    };
+}

frontend/.gitignore

@@ -13,7 +13,6 @@ node_modules
 /dist*
 coverage
 *.zip
-.direnv/
 
 # Test files
 cypress/screenshots

frontend/flake.nix

@@ -1,10 +0,0 @@
-{
-  description = "Vikunja frontend dev environment";
-
-  outputs = { self, nixpkgs }:
-    let pkgs = nixpkgs.legacyPackages.x86_64-linux;
-    in {
-      defaultPackage.x86_64-linux =
-        pkgs.mkShell { buildInputs = [ pkgs.nodePackages.pnpm pkgs.cypress pkgs.git-cliff ]; };
-    };
-}