Search: add query syntax highlighting for `repo:has()` and `repo:has.tag()`

Created by: camdencheek

This adds decoration for repo:has() and repo:has.tag() in the search query bar.

Stacked on https://github.com/sourcegraph/sourcegraph/pull/40112 Closes #40133 (closed)

Test plan

Added tests

App preview:

• Web
• Storybook

Check out the client app preview documentation to learn more.