first steps at getting started docs

[drmorr0]

• [x] I certify that this PR does not contain any code that has been generated with GitHub Copilot or any other AI-based code generation tool, in accordance with this project's policies.

Description

Getting started docs

Testing done

n/a

Additional info

Partially resolves #96 -- we still need an FAQ page and a detailed discussion about how to get metrics out.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 69.67%. Comparing base (0d96e54) to head (4245007).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #99 +/- ## ========================================== - Coverage 69.69% 69.67% -0.02% ========================================== Files 38 38 Lines 1917 1916 -1 ========================================== - Hits 1336 1335 -1 Misses 581 581 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.