Surveyor Map Framework

Changes:

• Fix a crash when serializing the new structure format on the client
• Refactor interfaces & keyset getters to be cleaner, and update the readme
• Improve exploration in various ways (helpful methods, using it at the right time)
• Add nice helpers to RegionSummary for interacting with positions and bitsets

Changelog: https://github.com/sisby-folk/surveyor/releases/tag/v0.1.0-beta.8