Add adversaries page

[argaudreau]

This PR adds the adversaries page, mostly as-is with a few enhancements here and there. Most notably:

• Syntax highlighting for editing executor commands. This is in the generic CodeEditor component so that it can be reused.
• Autosuggest component added to override any boring input styles.

Note: We don't have any toast messages yet, so when an action completes successfully or errors out, the user isn't really notified. Wanted to make that part of a larger discussion about how we want to handle user notifications in the future.

[argaudreau]

I also added the abilities page in this PR since most of the logic for it was already done