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/handler/api/unit/accessorymaterialall.go

@@ -0,0 +1,17 @@
+package unit
+
+import (
+	unitapischema "honoka-chan/internal/schema/api/unit"
+	"time"
+)
+
+func unitAccessoryMaterialAll() (res any, err error) {
+	res = unitapischema.AccessoryMaterialAllResp{
+		Result:     unitapischema.AccessoryMaterialAllData{},
+		Status:     200,
+		CommandNum: false,
+		TimeStamp:  time.Now().Unix(),
+	}
+
+	return res, err
+}