Add --share flag to CLI command

[CorentinBrtx]

Description

Add a --share flag to the gradio CLI to allow users to share their Gradio interfaces with others instead of having to add the share=True parameter to the python object.

Closes: #6030

[gradio-pr-bot]

🪼 branch checks and previews

•	Name	Status	URL
	Spaces	ready!	Spaces preview
	Website	ready!	Website preview
🦄	Changes	detected!	Details

---

Install Gradio from this PR

pip install https://gradio-pypi-previews.s3.amazonaws.com/257f7b88347a1d4394f4ae87847d6b856ced7940/gradio-5.1.0-py3-none-any.whl

Install Gradio Python Client from this PR

pip install "gradio-client @ git+https://github.com/gradio-app/gradio@257f7b88347a1d4394f4ae87847d6b856ced7940#subdirectory=client/python"

Install Gradio JS Client from this PR

npm install https://gradio-npm-previews.s3.amazonaws.com/257f7b88347a1d4394f4ae87847d6b856ced7940/gradio-client-1.6.0.tgz

Use Lite from this PR

<script type="module" src="https://gradio-lite-previews.s3.amazonaws.com/257f7b88347a1d4394f4ae87847d6b856ced7940/dist/lite.js""></script>

[gradio-pr-bot]

🦄 change detected

This Pull Request includes changes to the following packages.

Package	Version
gradio	minor

• Maintainers can select this checkbox to manually select packages to update.

With the following changelog entry.

Add --share flag to CLI command

Maintainers or the PR author can modify the PR title to modify this entry.

Something isn't right?

• Maintainers can change the version label to modify the version bump.
• If the bot has failed to detect any changes, or if this pull request needs to update multiple packages to different versions or requires a more comprehensive changelog entry, maintainers can update the changelog file directly.

[CorentinBrtx]

Hello @abidlabs !
This is my first open-source contribution, would love to have your review to be able to merge this 🚀
Thanks !

[abidlabs]

Hi @CorentinBrtx thanks for this PR! The --share flag is working as intended. However, I notice that when opening the public link, I get this error:

Would you be able to fix this error before we can merge this in?