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/model/accessory/accessory.go

@@ -0,0 +1,11 @@
+package accessorymodel
+
+type Accessory struct {
+	AccessoryID     int `xorm:"accessory_id pk"`
+	Exp             int `xorm:"exp"`
+	SmileMax        int `xorm:"smile_max"`
+	PureMax         int `xorm:"pure_max"`
+	CoolMax         int `xorm:"cool_max"`
+	DefaultMaxLevel int `xorm:"default_max_level"`
+	MaxLevel        int `xorm:"max_level"`
+}