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/live/continue.go

@@ -0,0 +1,13 @@
+package liveschema
+
+type ContinueData struct {
+	BeforeSnsCoin   int   `json:"before_sns_coin"`
+	AfterSnsCoin    int   `json:"after_sns_coin"`
+	ServerTimestamp int64 `json:"server_timestamp"`
+}
+
+type ContinueResp struct {
+	ResponseData ContinueData `json:"response_data"`
+	ReleaseInfo  []any        `json:"release_info"`
+	StatusCode   int          `json:"status_code"`
+}