Community: Establish Higress SIGs

[Xunzhuo]

Why do you need it?

Is your feature request related to a problem? Please describe in details

As Higress grows, SIG(special interest groups) need to be established to better organize people`s interests. This helps people focus on what they mostly are interested in.

How could it be?

A clear and concise description of what you want to happen.

Special Interest Groups

Name	Label	Interests	Tech-Stack	Leads	Related-HEPs	DingTalk
API Portal	sig/apim	API Portal	Go, Java, TypeScript	@lexburner @johnlanni @dspo	#535 #601
Controller	sig/controller	Gateway API, Ingress API	Go	@SpecialYang @Xunzhuo @CH3CHO
WASM	sig/wasm	Webassembly	Rust, C++, TinyGo	@johnlanni @WeixinX	#589 #587 #605 #678
Microservice	sig/microservice	Dubbo, Nacos, Consul, Eureka	Java, Go	@Charlie17Li @sjtuzbk
Ops	sig/ops	hgctl,installation,configuration	Go	@2456868764 @CH3CHO @Xunzhuo	#641
Console	sig/console	Web Console	Java, TypeScript	@CH3CHO
Observability	sig/observability	Prometheus, Grafana, Jaeger	Go	@2456868764 @rinfx
Automation	sig/automation	CI / CD / GitHub Workflow	GitHub Workflow	@Xunzhuo @CH3CHO
Serverless	sig/serverless	Knative	Java, Go	@johnlanni @vikizhao156