[DB] forgejo migration v2: create the forgejo_sem_ver table

(cherry picked from commit 86b26436af)
(cherry picked from commit 479cba59ac)
(cherry picked from commit 4765f9a889)
(cherry picked from commit af771410bf)
(cherry picked from commit d1ea9305d8)
(cherry picked from commit f77e1bb7ab)

models/forgejo_migrations/v1_20/v2.go

@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: MIT
+
+package forgejo_v1_20 //nolint:revive
+
+import (
+	"xorm.io/xorm"
+)
+
+func CreateSemVerTable(x *xorm.Engine) error {
+	type ForgejoSemVer struct {
+		Version string
+	}
+
+	return x.Sync(new(ForgejoSemVer))
+}