Add icons to adminer and dbgate

[afscrome]

Adds icons to adminer & dbgate.

PR Checklist

• Created a feature/dev branch in your fork (vs. submitting directly from a commit on main)
• Based off latest main branch of toolkit
• PR doesn't include merge commits (always rebase on top of our main, if needed)
• Contains NO breaking changes
• Code follows all style conventions

Other information

N/A