feat: adding new api methods and prefix parameter

[admon84]

This is a sizable update to the Python screepsapi library to bring it up-to-date with the latest Screeps API endpoints available on official servers.

I've tried to do my best to implement these changes being mindful not to break other projects using this library as a dependency.

Proposed Changes

• Adding methods for more Screeps API endpoints (credits: node-screeps-api/RawAPI.js)
• Added new prefix parameter for API and Socket connections
  • The prefix parameter provides flexibility to use values "/ptr" for public test realm or "/season" for seasonal server.
  • This would replace the need for the ptr parameter, but I also kept ptr to prevent breaking any projects using it.
• Added a few constants, such as DEFAULT_SHARD to replace hardcoding "shard0"

[admon84]

Is this repo still maintained? If so, please review this PR when you find the time. Thanks!

[AlinaNova21]

This looks good to me, although I personally haven't used this library myself and would like someone whos used it and is more familiar with python than me to look it over.