refactor(framework): Skip installation of dependencies in flwr new message

[jafermarq]

Before:

 flwr new @flwrlabs/quickstart-jax

🔗 Requesting download link for @flwrlabs/quickstart-jax...
🔽 Downloading app...
📦 Unpacking app into /Users/javier/quickstart-jax...
🎊 Flower App creation successful.

To run your Flower App, first install its dependencies:

        cd quickstart-jax && pip install -e .

then, run the app:

        flwr run .

💡 Check the README in your app directory to learn how to
customize it and how to run it using the Deployment Runtime.

after:

flwr new @flwrlabs/quickstart-jax

🔗 Requesting download link for @flwrlabs/quickstart-jax...
🔽 Downloading app...
📦 Unpacking app into /Users/javier/quickstart-jax...
🎊 Flower App creation successful.

Run the app as follows:

        flwr run quickstart-jax --stream

💡 Check the README in your app directory to learn how to
customize it and how to run it using the Deployment Runtime.

[Copilot]

Pull request overview

Updates the flwr new CLI success message to reflect the newer workflow where users can immediately run a freshly created app without being prompted to install dependencies.

Changes:

• Simplifies the post-creation prompt by removing the pip install -e . guidance.
• Replaces the “cd + run” instructions with a single flwr run <app_dir> --stream command.
• Keeps the README guidance intact while adjusting the surrounding prompt text.

Critical issues

• None.

Simplicity/readability suggestions

• Minor: remove the trailing space in the printed flwr run ... --stream command (PR comment added).

Consistency concerns

• None.

Whether the PR should be split

• No.

Overall verdict

• Looks good; only a minor prompt-formatting nit.

---

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[panh99]

LGTM!