feat: gitea: vendor + fix heatmap

package/gitea/source/models/migrations/v1_20/v258.go

@@ -0,0 +1,16 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package v1_20
+
+import (
+	"xorm.io/xorm"
+)
+
+func AddPinOrderToIssue(x *xorm.Engine) error {
+	type Issue struct {
+		PinOrder int `xorm:"DEFAULT 0"`
+	}
+
+	return x.Sync(new(Issue))
+}