Options: raise Exception if per-game options are in root

Options: implement progression balancing and accessibility on new system
Options: implement the notion of "common" and "per_game_common" options in various systems
Options: centralize item and location name checking
Spoiler: prettier print some lists, sets and dicts
WebHost: add common options into /templates

WebHostLib/options.py

@@ -5,6 +5,7 @@ import yaml
 import json
 
 from worlds.AutoWorld import AutoWorldRegister
+import Options
 
 target_folder = os.path.join("WebHostLib", "static", "generated")
 
@@ -18,10 +19,17 @@ def create():
             option.range_end: "maximum value"
         }
         return data, notes
+
+    def default_converter(default_value):
+        if isinstance(default_value, (set, frozenset)):
+            return list(default_value)
+        return default_value
+
     for game_name, world in AutoWorldRegister.world_types.items():
         res = Template(open(os.path.join("WebHostLib", "templates", "options.yaml")).read()).render(
-            options=world.options, __version__=__version__, game=game_name, yaml_dump=yaml.dump,
-            dictify_range=dictify_range
+            options={**world.options, **Options.per_game_common_options},
+            __version__=__version__, game=game_name, yaml_dump=yaml.dump,
+            dictify_range=dictify_range, default_converter=default_converter,
         )
 
         with open(os.path.join(target_folder, game_name + ".yaml"), "w") as f: