Add all files again with v2 postfix to URL

v2/internal/metadata/metadata.go

@@ -0,0 +1,22 @@
+package metadata
+
+import (
+	"os"
+
+	"git.mills.io/prologic/bitcask/v2/internal"
+)
+
+type MetaData struct {
+	IndexUpToDate    bool  `json:"index_up_to_date"`
+	ReclaimableSpace int64 `json:"reclaimable_space"`
+}
+
+func (m *MetaData) Save(path string, mode os.FileMode) error {
+	return internal.SaveJsonToFile(m, path, mode)
+}
+
+func Load(path string) (*MetaData, error) {
+	var m MetaData
+	err := internal.LoadFromJsonFile(path, &m)
+	return &m, err
+}