REPL related improvements and fixes

[xTVaser]

Motivated by - open-goal/opengoal-vscode#358

This addresses the following:

• Fixes closing target after connecting subtitle editor causes REPL spam #2939 spam edge-case
• Stop picking a different nREPL port based on the game mode by default, this causes friction for tools in the average usecase (having a REPL open for a single game, and wanting to connect to it). goalc spins up fine even if the port is already bound to.
  • For people that need/want this behaviour, adding per-game configuration to the repl-config.json is on my todo list.
• Allows goalc to permit redefining symbols, including functions. This is defaulted to off via the repl-config.json but it allows you to for example, change the definition of a function without having to restart and rebuild the entire game.
  
• Updates the welcome message to include a bunch of useful metadata up-front. Cleaned up all the startup logs that appear when starting goalc, many of whom's information is now included in the welcome message.

  • Before:
    

  • After: