Add Katib Release process guide (#1641)

* Add RELEASE doc

* Finish changelog script

* Update release doc

* Changes after review

* Modify README

* Add SDK PR link

* Modify doc

* Changelog for v0.6.0-rc.0

* Modify changelog script

* Add 0.2 changelog

* Remove TODO

* Add 0.6 release

* Add v0.9.0 release

* Add 0.10.0 release

* Add v0.10.1 release

* Add v0.11.0 release

* Add v0.11.1 release

* Fix release

* Update step