SC2: client revamp (#967)

SC2 client now relies almost entirely on the map file and server for the locations and just facilitates them, should make it significantly more resilient to objectives being added or removed


* SC2: fix client crash on printjson messages with more [ than ]

* SC2: move text to queue, that actually clears memory

* SC2: Announce which mission is being loaded


Co-authored-by: black-sliver <59490463+black-sliver@users.noreply.github.com>

CommonClient.py

@@ -152,8 +152,9 @@ class CommonContext:
     # locations
     locations_checked: typing.Set[int]  # local state
     locations_scouted: typing.Set[int]
-    missing_locations: typing.Set[int]
+    missing_locations: typing.Set[int]  # server state
     checked_locations: typing.Set[int]  # server state
+    server_locations: typing.Set[int]  # all locations the server knows of, missing_location | checked_locations
     locations_info: typing.Dict[int, NetworkItem]
 
     # internals
@@ -184,8 +185,9 @@ class CommonContext:
         self.locations_checked = set()  # local state
         self.locations_scouted = set()
         self.items_received = []
-        self.missing_locations = set()
+        self.missing_locations = set()  # server state
         self.checked_locations = set()  # server state
+        self.server_locations = set()  # all locations the server knows of, missing_location | checked_locations
         self.locations_info = {}
 
         self.input_queue = asyncio.Queue()
@@ -634,6 +636,7 @@ async def process_server_cmd(ctx: CommonContext, args: dict):
         # when /missing is used for the client side view of what is missing.
         ctx.missing_locations = set(args["missing_locations"])
         ctx.checked_locations = set(args["checked_locations"])
+        ctx.server_locations = ctx.missing_locations | ctx. checked_locations
 
     elif cmd == 'ReceivedItems':
         start_index = args["index"]