feat: Added new geoip service

[benjackwhite]

Problem

The current code path to load mmdb is a mess and we trip over it a bunch.

NEEDS: Changes to deployments to mount the relevant mmdb

Changes

• Adds a lazyloading GeoipService
• Simplify to only load from disk
• Adds a bunch of tests to cover all possible failure modes
• Need to ensure that with no mmdb locally, every possible startup way downloads it

👉 Stay up-to-date with PostHog coding conventions for a smoother review.

Does this work well for both Cloud and self-hosted?

How did you test this code?

[github-actions]

Size Change: -5 B (0%)

Total Size: 1.21 MB

ℹ️ View Unchanged

Filename	Size	Change
frontend/dist/toolbar.js	1.21 MB	-5 B (0%)

_{compressed-size-action}