Set up Criterion for benchmarking.

[ndouglas]

User Story

As an engineer, I want to set up benchmarking so that I have assurances of performance over time and can identify performance regressions when they occur.

Tasks

• [x] Configure Criterion and learn how to use it.
• [x] Configure CI tests to run benchmarks. How do we test on this? 🤔

Acceptance Criteria

• [x] Criterion is configured for the project.
• [x] At least one benchmark is configured.
• [x] Benchmarks run as part of CI tests.