Problem

Enterprise coder server needs up to date license information to feed the Entitlements API and Feature Server.

RFC

Definition of Done

1. On startup, read licenses, validate them, compute entitlements struct
2. Watch pubsub for license updates, compute updated entitlements struct

Acceptance Criteria

1. Obtain a valid license file
2. On a new Coder deployment, without a license, verify that "has_license": false appears in output of
   coder features list -o json
3. Add the license file to a new coder deployment
   coder license add <license file>
4. Verify that "has_license": true appears in
   coder features list -o json
5. Remove the license from the deployment
   coder license list
   obtain license ID
   coder license delete <id>
6. verify that "has_license": false appears in output of
   coder features list -o json