Add title load slot selection

scripts/core/campaign_state.gd

@@ -191,10 +191,18 @@ func load_manual_game() -> bool:
 	return false
 
 
+func get_save_summary() -> Dictionary:
+	return _get_save_summary_from_path(SAVE_PATH)
+
+
 func get_manual_save_summary() -> Dictionary:
-	if not has_manual_save():
+	return _get_save_summary_from_path(MANUAL_SAVE_PATH)
+
+
+func _get_save_summary_from_path(path: String) -> Dictionary:
+	if not FileAccess.file_exists(path):
 		return {}
-	var parsed = JSON.parse_string(FileAccess.get_file_as_string(MANUAL_SAVE_PATH))
+	var parsed = JSON.parse_string(FileAccess.get_file_as_string(path))
 	if typeof(parsed) != TYPE_DICTIONARY:
 		return {}
 	var completed_count := 0