fix: various changes

Down to 2985 errors on game start as a observer

Author: Matti-96

.metadata/metadata.json

@@ -12,7 +12,10 @@
       "common/achievements",
       "common/ai_strategies",
       "common/buildings",
+      "common/buy_packages",
+      "common/character_interactions",
       "common/character_templates",
+      "common/character_traits",
       "common/combat_unit_groups",
       "common/combat_unit_types",
       "common/commander_orders",
@@ -26,6 +29,7 @@
       "common/discrimination_trait_groups",
       "common/discrimination_traits",
       "common/diplomatic_plays",
+      "common/diplomatic_catalysts",
       "common/dynamic_country_map_colors",
       "common/dynamic_country_names",
       "common/flag_definitions",
@@ -37,6 +41,7 @@
       "common/history/characters",
       "common/history/conscription",
       "common/history/countries",
+      "common/history/cultures",
       "common/history/diplomacy",
       "common/history/diplomatic_plays",
       "common/history/global",
@@ -90,6 +95,7 @@
       "events/tech_events",
 
       "gfx/map",
+      "gfx/map/city_data/city_centerpiece",
       "gfx/map/city_data/city_types",
       "gfx/portraits/portrait_modifiers",