* Add relay count tracking workflow with dual charts
This commit adds:
- New GitHub workflow to track relay counts
- Two charts: BitChat-compatible relays and total functioning relays
- Extended history for both charts (70 days)
- Project structure improvements with scripts and assets directories
- Updated documentation in README.md and other files
- Dependencies in requirements.txt
* Remove overlapping data point labels from relay count charts
* Add .venv to gitignore
* Add relay location maps and automation workflow
* Improve relay maps with proper world map backgrounds using cartopy
* Add relay location map to README
* update readme
