feat: show file size warning in rill developer

[AdityaHegde]

Deploying large files give a generic error message. We should instead do a proactive check.

1. Every time a large is updated we show a notification that the size is large.
2. Throw a blocking error during deploy if any file is large.

Pending design and messaging.

Closes APP-278

Checklist:

• [ ] Covered by tests
• [ ] Ran it and it works as intended
• [ ] Reviewed the diff before requesting a review
• [ ] Checked for unhandled edge cases
• [ ] Linked the issues it closes
• [ ] Checked if the docs need to be updated. If so, create a separate Linear DOCS issue
• [ ] Intend to cherry-pick into the release branch
• [ ] I'm proud of this work!