Feature request: Local multiplayer without internet access via hotspot or Bluetooth Android phone

Before creating

• This is NOT a gameplay feature from Civ VI, BNW, or outside - see Roadmap
• This is NOT a gameplay feature from Vanilla Civ V or from G&K - If so, it should be a comment in https://github.com/yairm210/Unciv/issues/4697

Problem Description

I'm annoyed by the inability to play on a local network with friends without an internet connection and create my own server.

Related Issue Links

No response

Desired Solution

The ability to create your own server and play with friends on their phones over a local network or Bluetooth without a constant internet connection

Alternative Approaches

I'm annoyed by the inability to play on a local network with friends without an internet connection and create my own server.

Additional Context

No response