Support parsing JSON games without variant

This enables to parse games without requiring DB access
and a full specification of all the variants.
The downside is that in such games, legal clues cannot
be modeled perfectly, but for theoretic analysis of the game
this is still irrelevant.

src/hanabi/live/hanab_live.py

@@ -44,7 +44,8 @@ class HanabLiveInstance(hanab_game.HanabiInstance):
         return constants.VARIANT_IDS_STANDARD_DISTRIBUTIONS[instance.num_suits][instance.num_dark_suits]
 
 
-def parse_json_game(game_json: Dict) -> Tuple[HanabLiveInstance, List[Action]]:
+def parse_json_game(game_json: Dict, as_hanab_live_instance: bool = True) \
+        -> Tuple[HanabLiveInstance | hanab_game.HanabiInstance, List[Action]]:
     game_id = game_json.get('id', None)
     players = game_json.get('players', [])
     num_players = len(players)
@@ -52,7 +53,7 @@ def parse_json_game(game_json: Dict) -> Tuple[HanabLiveInstance, List[Action]]:
         raise ParseError(num_players)
 
     options = game_json.get('options', {})
-    var_id = variants.variant_id(options.get('variant', 'No Variant'))
+    var_name = options.get('variant', 'No Variant')
     deck_plays = options.get('deckPlays', False)
     one_extra_card = options.get('oneExtraCard', False)
     one_less_card = options.get('oneLessCard', False)
@@ -74,6 +75,8 @@ def parse_json_game(game_json: Dict) -> Tuple[HanabLiveInstance, List[Action]]:
         raise NotImplementedError(
             "detrimental characters not supported, cannot determine score of game {}".format(game_id)
         )
+    if as_hanab_live_instance:
+        var_id = variants.variant_id(var_name)
         return HanabLiveInstance(
             deck, num_players, var_id,
             deck_plays=deck_plays,
@@ -82,6 +85,23 @@ def parse_json_game(game_json: Dict) -> Tuple[HanabLiveInstance, List[Action]]:
             all_or_nothing=all_or_nothing,
             starting_player=starting_player
         ), actions
+    else:
+        hand_size = constants.HAND_SIZES[num_players]
+        if one_less_card:
+            hand_size -= 1
+        if one_extra_card:
+            hand_size += 1
+
+        clue_starved = 'Clue Starved' in var_name
+
+        return hanab_game.HanabiInstance(
+            deck, num_players, hand_size,
+            clue_starved=clue_starved,
+            deck_plays=deck_plays,
+            all_or_nothing=all_or_nothing,
+            starting_player=starting_player
+        ), actions
+
 
 
 class HanabLiveGameState(hanab_game.GameState):