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/accessorytab.go

@@ -0,0 +1,20 @@
+package unit
+
+import (
+	"encoding/json"
+	unitapischema "honoka-chan/internal/schema/api/unit"
+	honokautils "honoka-chan/pkg/utils"
+	"time"
+)
+
+func unitAccessoryTab() (res any, err error) {
+	data := honokautils.ReadAllText("assets/serverdata/accessoryTab.json")
+	resp := unitapischema.AccessoryTabResp{}
+	err = json.Unmarshal([]byte(data), &resp)
+	if err != nil {
+		return nil, err
+	}
+	resp.TimeStamp = time.Now().Unix()
+
+	return resp, err
+}