* chore: mockgen archived, moved to new location
Fixing up some linting errors that show up on Darwin, but not in CI.
- An opt-in feature has been added to the agent to allow deprioritizing non coder-related processes for CPU by setting their niceness level to 10. - Opting in to the feature requires setting CODER_PROC_PRIO_MGMT to a non-empty value.