Add v3.0 observability roadmap

Signed-off-by: NBenjamin <benjamin@yunify.com>

docs/roadmap.md

@@ -23,6 +23,7 @@ KubeSphere Roadmap demonstrates a list of open source product development plans
 - [ ] Most of the work will be bugfix
 - [ ] Refactor RBAC in order to support future versions regarding third-party plugins with custom access control.
 - [ ] Refactor installer
+- [ ] FluentBit Operator upgrade
 
 ### v3.0.0
 
@@ -32,6 +33,14 @@ KubeSphere Roadmap demonstrates a list of open source product development plans
 
 #### Observability
 
+- [ ] Logging console enhancement
+- [ ] Monitoring stack upgrade including Prometheus, Prometheus Operator, Node exporter, kube-state-metrics etc.
+- [ ] Custom metrics support including application custom metrics dashboard, custom metrics HPA
+- [ ] Integration with Alertmanager
+- [ ] K8s Event management
+- [ ] K8s Audit Support
+- [ ] Notification Enhancement
+
 #### Network
 
 #### Storage