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!

[ericokuma]

@AdityaHegde, is this ready for review?