feat: add the release storage interface (#1107)

pkg/engine/release/storage.go

@@ -0,0 +1,27 @@
+package release
+
+import (
+	v1 "kusionstack.io/kusion/pkg/apis/api.kusion.io/v1"
+)
+
+// Storage is used to provide storage service for multiple releases.
+type Storage interface {
+	// Get returns a specified Release which is determined by the group of Project, Workspace
+	// and Revision.
+	Get(project, workspace string, revision uint64) (*v1.Release, error)
+
+	// GetRevisions returns the Revisions of a specified Project and Workspace.
+	GetRevisions(project, workspace string) ([]uint64, error)
+
+	// GetStackBoundRevisions returns the Revisions of a specified Project, Stack and Workspace.
+	GetStackBoundRevisions(project, stack, workspace string) ([]uint64, error)
+
+	// GetLatestRevision returns the latest State which corresponds to the current infra Resources.
+	GetLatestRevision(project, workspace string) (uint64, error)
+
+	// Create creates a new Release in the Storage.
+	Create(release *v1.Release) error
+
+	// Update updates an existing Release in the Storage.
+	Update(release *v1.Release) error
+}