Implement more endpoints & overhaul [2/n]

Drop LevelDB and move all the things to SQLite.

Implemented endpoints:
/api <unit, accessoryMaterialAll>
/api <unit, accessoryTab>
/live/continue
/live/partyList
/unit/favoriteAccessory (WIP)
/unit/sale

Signed-off-by: Sean Du <do4suki@gmail.com>

internal/schema/payment/productlist.go

@@ -1,15 +1,15 @@
-package payment
+package paymentschema
 
-import "honoka-chan/internal/schema/api/payment"
+import paymentapischema "honoka-chan/internal/schema/api/payment"
 
 type ProductListData struct {
-	RestrictionInfo  payment.RestrictionInfo `json:"restriction_info"`
-	UnderAgeInfo     payment.UnderAgeInfo    `json:"under_age_info"`
-	SnsProductList   []any                   `json:"sns_product_list"`
-	ProductList      []any                   `json:"product_list"`
-	SubscriptionList []any                   `json:"subscription_list"`
-	ShowPointShop    bool                    `json:"show_point_shop"`
-	ServerTimestamp  int64                   `json:"server_timestamp"`
+	RestrictionInfo  paymentapischema.RestrictionInfo `json:"restriction_info"`
+	UnderAgeInfo     paymentapischema.UnderAgeInfo    `json:"under_age_info"`
+	SnsProductList   []any                            `json:"sns_product_list"`
+	ProductList      []any                            `json:"product_list"`
+	SubscriptionList []any                            `json:"subscription_list"`
+	ShowPointShop    bool                             `json:"show_point_shop"`
+	ServerTimestamp  int64                            `json:"server_timestamp"`
 }
 
 type ProductListResp struct {