REPL related improvements and fixes (#3545)

Motivated by - https://github.com/open-goal/opengoal-vscode/pull/358

This addresses the following:
- Fixes #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.
![Screenshot 2024-06-02
124558](https://github.com/open-goal/jak-project/assets/13153231/28f81f6e-b7b8-4172-9787-f96e4ab1305b)
- 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:

![image](https://github.com/open-goal/jak-project/assets/13153231/814c2374-4808-408e-9ed6-67114902a1d9)

  - After:
![Screenshot 2024-06-01
235954](https://github.com/open-goal/jak-project/assets/13153231/f3f459fb-2cbb-46ba-a90f-318243d4b3b3)

scripts/examples/nrepl-test.py

@@ -1,5 +1,7 @@
 import socket
 import struct
+from time import sleep
+
 clientSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM);
 clientSocket.connect(("127.0.0.1", 8181))
 print(clientSocket)
@@ -11,5 +13,5 @@ form = "(:status)"
 header = struct.pack('<II', len(form), 10)
 
 clientSocket.sendall(header + form.encode())
-
-
+sleep(1)
+clientSocket.sendall(header + form.encode())