Add host cheats for streamers (Specifically Enzo) ⭐ (#3671)

## Description:

- Adds a "Host Cheats" toggle in the private lobby options section that
reveals a dedicated section with four host-only cheats: infinite gold,
infinite troops, gold multiplier, and starting gold
- Only the lobby creator receives the cheat effects in-game (checked via
`isLobbyCreator` in DefaultConfig)
- Joining players see active host cheats displayed as yellow badges in
the lobby UI
- Adds `hostCheats` optional object to `GameConfigSchema` and wires it
through the server config update whitelist
- Raises the intent size limit for `update_game_config` messages
(lobby-only, not stored in turn history) to prevent rate-limiter kicks
(I always got too-much-data-kicked after selecting "host cheats" lol)

<img width="861" height="525" alt="image"
src="https://github.com/user-attachments/assets/51e51ec4-c2e8-46ca-b258-11a93487964f"
/>


<img width="933" height="825" alt="image"
src="https://github.com/user-attachments/assets/5acbd38d-2097-42e1-ba78-0fb17d6afe82"
/>

## Please complete the following:

- [X] I have added screenshots for all UI updates
- [X] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [X] I have added relevant tests to the test directory
- [X] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

FloPinguin

resources/lang/en.json

@@ -205,7 +205,7 @@
     "max_timer": "Game length (minutes)",
     "max_timer_placeholder": "Mins",
     "max_timer_invalid": "Please enter a valid max timer value (1-120 minutes)",
-    "enables_title": "Enable Settings",
+    "enables_title": "Disable Units",
     "start": "Start Game",
     "options_changed_no_achievements": "Custom settings – achievements disabled",
     "gold_multiplier": "Gold multiplier",
@@ -386,7 +386,8 @@
     "disabled_units": "Disabled Units",
     "game_length": "Game length",
     "pvp_immunity": "PVP immunity duration",
-    "starting_gold": "Starting Gold"
+    "starting_gold": "Starting Gold",
+    "host_cheats": "Host Cheats"
   },
   "public_lobby": {
     "title": "Waiting for Game Start...",
@@ -440,7 +441,7 @@
     "compact_map": "Compact Map",
     "disable_alliances": "Disable alliances",
     "water_nukes": "Water nukes",
-    "enables_title": "Enable Settings",
+    "enables_title": "Disable Units",
     "player": "Player",
     "players": "Players",
     "nation_players": "Nations",
@@ -463,6 +464,7 @@
     "gold_multiplier_placeholder": "2.0x",
     "starting_gold": "Starting Gold (Millions)",
     "starting_gold_placeholder": "5",
+    "host_cheats": "Host Cheats",
     "leave_confirmation": "Are you sure you want to leave the lobby?"
   },
   "team_colors": {