feat(cli): add feature to disable downloads (#3465)

* feat(cli): add feature to disable downloads

---------

Co-authored-by: Jonathan Kelley <jkelleyrtp@gmail.com>

.github/workflows/main.yml

@@ -193,7 +193,7 @@ jobs:
       - name: Build all flake outputs
         run: om ci
       - name: Ensure devShell has all build deps
-        run: nix develop -c cargo build -p dioxus-cli
+        run: nix develop -c cargo build -p dioxus-cli --features no-downloads
 
   playwright:
     if: github.event.pull_request.draft == false