Add v0.2.0 changelog (openkruise#143)

* Add v0.2.0 changelog

* fix markdown spellcheck

* Fix typo

remove outdated doc

Add a tutorial for kruise controllers (openkruise#25)

* add a tutorial for kruise controllers

* update readme

* update readme

* update readme

* update command

update yamls and add helm chart (openkruise#10)

* update yamls and add helm chart

* fix make manifests

* skip execute helm template in Makefile