Add draft of 2023 roadmap

Signed-off-by: RainbowMango <qdurenhongcai@gmail.com>

ROADMAP.md

@@ -2,30 +2,21 @@
 
 This document defines a high level roadmap for Karmada development and upcoming releases.
 Community and contributor involvement is vital for successfully implementing all desired items for each release.
-We hope that the items listed below will inspire further engagement from the community to keep karmada progressing and shipping exciting and valuable features.
+We hope that the items listed below will inspire further engagement from the community to keep Karmada progressing and shipping exciting and valuable features.
 
-## 2022 H1
-- Multi-cluster HA scheduling policy
-  * spread by region
-  * spread by zone
-  * spread by provider
-- Multi-cluster Ingress
+## 2023 H1
+- Cluster scheduling group
+- Multiple schedulers support
+- Application-level failover
 - Multi-cluster HPA (Horizontal Pod Autoscaling)
-- Federated resource quota
-- API reference
-- [Karmada website](https://karmada.io/) refactor
-- Policy-based governance, risk, and compliance
-- Multi-cluster DNS (cluster identity)
-- Global search across clusters
-- Scheduling re-balancing
+- Karmada operator
+- ResourceInterpreter include third-party CRD resources
+- Karmada playgroud
 
-## 2022 H2
+## 2023 H2
 - Karmada Dashboard - alpha release
-- Karmada scalability baseline (performance report)
-- Cluster addons
-- Helm chart propagation
-- Multi-cluster events
-- Multi-cluster Operator specifications
+- Multi-cluster workflow
+- Cluster addon management
 - Multi-cluster Application
 - Multi-cluster monitoring
 - Multi-cluster logging
@@ -33,8 +24,7 @@ We hope that the items listed below will inspire further engagement from the com
 - Multi-cluster RBAC
 - Multi-cluster networking
 - Data migration across clusters
-- Multi-cluster workflow
-- Integration with ecosystem
+- Integration with terraform
 - Cluster lifecycle management
 - Image registry across clouds
 - Multi-cluster Service Mesh solutions