chore: update roadmap doc (#2108)

Signed-off-by: 煜星 <[email protected]>

Author: starnop

ROADMAP.md

@@ -1,30 +1,42 @@
 # sealer Roadmap
 
+## Improve the basic capabilities of the Sealer Image
+
+* Multi-architecture/hybrid architecture support
+* Easy-to-use image caching capabilities with no intrusion
+* Provide better `Sealer Image` collaboration mechanisms
+  * open the `Sealer Image` Repo project
+  * contains most of the common open source middleware and kxs runtime(not provided by the Sealer community)
+
 ## Focus the core of distributed application definition
 
 * Keep exploring reducing complexity of k8s-based distributed application definition
+* Support the full life cycle management of application and decoupled from the kxs runtime
+* Support more built-in application types
+  * contains common application types including helm chart, kube resource, OAM, etc
+  * provide extensibility, supports user-defined extended app types
 * Support ClusterImage on more heterogeneous infrastucture:
   * general OS and arch
   * general existing Kubernetes
 
-## sealer spec Definition Stabilization
+## Build stable and easy-to-use cluster delivery capabilities
+
+* support for large-scale cluster life cycle management, such as 3K nodes
+* support for managed existing clusters
+* support more kxs runtime support, such as k8s, k0s, k3s, etc
+* support IAAS diagnostic capabilities, provider cluster pre-installation check tools
+
+## Sealer spec Definition Stabilization
 
 * Kubefile stabilization
 * Clusterfile stabilization
 * ClusterImage spec stabilization
   * define Kubernetes part and application part separately
   * protocol stabilization among sealer binary, basefs and cluster instance
 
-## Neutral Architecture and Cloud Native Ecosystem Integration
-
-* Modularize architecture, including:
-  * data structure
-  * control workflow
-  * data flow
-* HA built-in image registry
-* others
-
 ## Performance Improvement
 
+* Improve `Sealer Image` distribution efficiency as possible
+* Improves `sealer build` efficiency as possible through caching and other capabilities
 * Improve cluster bootstrap efficiency as possible
-* Improve ClusterImage distribution efficiency as possible
+