What this PR does

Before this PR:

• Plugin size displayed as 0 in the plugin detail modal
• Plugin detail modal had basic styling

After this PR:

• Fixed plugin size displaying as 0 by using null for unknown sizes
• Improved plugin detail modal UI with better layout and styling

Fixes #

Why we need it and why it was done in this way

The plugin detail modal was showing size as 0 because the size value was not being properly passed or was being treated as unknown. This PR fixes the issue by properly handling null values for unknown sizes and improves the overall UI styling.

The following tradeoffs were made:

The following alternatives were considered:

Links to places where the discussion took place:

Breaking changes

If this PR introduces breaking changes, please describe the changes and the impact on users.

Special notes for your reviewer

Checklist

This checklist is not enforcing, but it's a reminder of items that could be relevant to every PR.
Approvers are expected to review this list.

• PR: The PR description is expressive enough and will help future contributors
• Code: Write code that humans can understand and Keep it simple
• Refactor: You have left the code cleaner than you found it (Boy Scout Rule)
• Upgrade: Impact of this change on upgrade flows was considered and addressed if required
• Documentation: A user-guide update was considered and is present (link) or not required. Check this only when the PR introduces or changes a user-facing feature or behavior.
• Self-review: I have reviewed my own code (e.g., via /gh-pr-review, gh pr diff, or GitHub UI) before requesting review from others

Release note

Fixed plugin size displaying as 0 in the plugin detail modal. Improved plugin detail modal UI with better layout and styling.