horsegen: generate inherited skills

horsegen/skill.sql

@@ -18,7 +18,11 @@ SELECT
 	n.name,
 	n.description,
 	d.group_id,
-	g.name,
+	CASE
+		WHEN g.name IS NOT NULL THEN g.name
+		WHEN d.unique_skill_id_1 != 0 THEN n.name
+		ELSE ''
+	END AS group_name,
 	d.rarity,
 	d.group_rate,
 	d.grade_value,
@@ -62,10 +66,11 @@ SELECT
 	d.target_type_2_3,
 	d.target_value_2_3,
 	IFNULL(p.need_skill_point, 0) AS sp_cost,
+	d.unique_skill_id_1,
 	d.icon_id,
 	ROW_NUMBER() OVER (ORDER BY d.id) - 1 AS "index"
 FROM skill_data d
 	JOIN skill_names n ON d.id = n.id
-	JOIN skill_groups g ON d.group_id = g.group_id
+	LEFT JOIN skill_groups g ON d.group_id = g.group_id
 	LEFT JOIN single_mode_skill_need_point p ON d.id = p.id
 ORDER BY d.id