Allow Drydock blueprints to be tagged and searched, and give types some little icons

Summary:
Ref T10457.

• Let blueprints be tagged so you can search and annotate them a little more easily.
• Give each blueprint type an optional icon to make things a little easier to parse visually.

Test Plan:

• Tagged blueprints.
• Searched by tags.
• Looked at nice little icons.

{F1139712}

Reviewers: chad

Reviewed By: chad

Subscribers: yelirekim

Maniphest Tasks: T10457

Differential Revision: https://secure.phabricator.com/D15392