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/startup/startup.go

@@ -1,6 +1,6 @@
 package startup
 
 func StartUp() {
-	CreateTable()
-	InitUserData(0)
+	CreateTables()
+	LoadUnitData()
 }