The great city revamp

[sleepyfran]

This chunky boy of a PR finally addresses one of my main pain points with the game: cities were boring! My initial idea was to do the huge work of adding descriptors to each street and then, through many many many layers of matches, create sort of personalized descriptions for each street in a city. This proved not to work quite as much as I imagined, so I turned to attempt using a local LLM to do the work for each description.

There's still a bunch of work to do with this, but as a first draft I think it works pretty well. Major points of the PR are:

• Added a local model that is downloaded on build time, initialized in a separate mailbox and accepts generating any sort of description based on a prompt. For now it's only used to describe places via the look command, but I'm planning to expand the usage around the game for dialogues and other descriptions like concert results.
• Streets are back in the game map with a cute little street graph to traverse city zones.
• Added a metro system to travel between zones.
• Added a weather system that follows a realistic-ish model of the city in that season.
• The map command now displays directions instead of teleporting the player there immediately.
• Mexico DC, Tokyo and Sydney have been removed for now since it was already a huge work to adapt the cities that did make the cut. Planning to add them back at some point.
• Added a City Explorer app made with Avalonia that helps visualizing the city graph, metro and the places inside of it.