Add NixOS VM configuration and new media search endpoint

- Introduced a new NixOS VM configuration in `flake.nix` for testing purposes.
- Updated CI workflow to build the VM using the flake input for a more streamlined process.
- Added a new API endpoint `/search` in the collection API to search owned media by title, with optional filtering by media type.
- Refactored frontend components to utilize the new media search functionality, updating types and state management accordingly.
- Enhanced CSS for the map component to ensure proper rendering in various layouts.

flake.nix

@@ -76,6 +76,13 @@
         frontend = frontend;
       };
 
+      nixosConfigurations.test-vm = nixpkgs.lib.nixosSystem {
+        inherit system;
+        modules = [
+          ./nix/test-vm.nix
+        ];
+      };
+
       devShells.${system}.default = pkgs.mkShell {
         buildInputs = [
           pythonEnv