API Key dashboard

[stuartwk]

We've added a way for users to manage API keys https://github.com/urnetwork/connect/blob/main/api/bringyour.yml#L1234-L1287.

In the web app:

• Generate a new key. The api key is returned on creation. Once they close the modal, the key is no longer available to retrieve, so prompt the user to copy and store it in a safe place
• List keys. This gives a list of keys with ID (for reference, no user facing) name, and create time. It does not contain the key itself.
• Delete key. User should be able to delete key by ID.