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/repl/config.cpp

@@ -7,15 +7,21 @@
 namespace REPL {
 void to_json(json& j, const Config& obj) {
   j = json{
+      {"nreplPort", obj.nrepl_port},
       {"gameVersionFolder", obj.game_version_folder},
       {"numConnectToTargetAttempts", obj.target_connect_attempts},
       {"asmFileSearchDirs", obj.asm_file_search_dirs},
       {"keybinds", obj.keybinds},
       {"perGameHistory", obj.per_game_history},
+      {"permissiveRedefinitions", obj.permissive_redefinitions},
   };
 }
 
 void from_json(const json& j, Config& obj) {
+  // TODO - make a camelCase variant of json_serialize/deserialize macros
+  if (j.contains("nreplPort")) {
+    j.at("nreplPort").get_to(obj.nrepl_port);
+  }
   if (j.contains("gameVersionFolder")) {
     j.at("gameVersionFolder").get_to(obj.game_version_folder);
   }
@@ -55,6 +61,9 @@ void from_json(const json& j, Config& obj) {
   if (j.contains("perGameHistory")) {
     j.at("perGameHistory").get_to(obj.per_game_history);
   }
+  if (j.contains("permissiveRedefinitions")) {
+    j.at("permissiveRedefinitions").get_to(obj.permissive_redefinitions);
+  }
   // if there is game specific configuration, override any values we just set
   if (j.contains(version_to_game_name(obj.game_version))) {
     from_json(j.at(version_to_game_name(obj.game_version)), obj);