feat: add `/bbox` endpoint

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 27.63158% with 275 lines in your changes missing coverage. Please review.

Project coverage is 58.65%. Comparing base (c0e36c4) to head (8c98149). Report is 1 commits behind head on main.

Files	Patch %	Lines
src/render/index.ts	16.27%	180 Missing :warning:
src/server/index.ts	42.42%	95 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #89 +/- ## ========================================== - Coverage 63.39% 58.65% -4.74% ========================================== Files 19 18 -1 Lines 1262 1432 +170 Branches 87 93 +6 ========================================== + Hits 800 840 +40 - Misses 460 590 +130 Partials 2 2 ```

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