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)

common/cross_sockets/XSocketServer.cpp

@@ -35,7 +35,7 @@ void XSocketServer::shutdown_server() {
   close_server_socket();
 }
 
-bool XSocketServer::init_server() {
+bool XSocketServer::init_server(bool failure_may_occur) {
   listening_socket = open_socket(AF_INET, SOCK_STREAM, 0);
   if (listening_socket < 0) {
     listening_socket = -1;
@@ -76,19 +76,27 @@ bool XSocketServer::init_server() {
   addr.sin_port = htons(tcp_port);
 
   if (bind(listening_socket, (sockaddr*)&addr, sizeof(addr)) < 0) {
-    lg::error("[XSocketServer:{}] failed to bind", tcp_port);
+    if (failure_may_occur) {
+      lg::debug("[XSocketServer:{}] failed to bind", tcp_port);
+    } else {
+      lg::error("[XSocketServer:{}] failed to bind", tcp_port);
+    }
     close_server_socket();
     return false;
   }
 
   if (listen(listening_socket, 0) < 0) {
-    lg::error("[XSocketServer:{}] failed to listen", tcp_port);
+    if (failure_may_occur) {
+      lg::debug("[XSocketServer:{}] failed to listen", tcp_port);
+    } else {
+      lg::error("[XSocketServer:{}] failed to listen", tcp_port);
+    }
     close_server_socket();
     return false;
   }
 
   server_initialized = true;
-  lg::info("[XSocketServer:{}] initialized", tcp_port);
+  lg::debug("[XSocketServer:{}] initialized", tcp_port);
   post_init();
   return true;
 }