[Docs] Add initial CHANGELOG.md with changelogs from previous release (…

…#4708)

* Create CHANGELOG.md

- Logged all the changes for previous Releases.

- Added "View" hypertext instead of commit numbers

* Docs :Format release v1.2.4.12 based on new release format

* Fix : Links to PR in Doxygen html output

* docs: Shift Changelogs to end of list in Side Nav bar

* Doxygen : Bump up layout v1.8.12  -> v1.11.0

* Doc: Add changelog to the Nav bar

* Fix: Command visible in README

* docs: Refactor Changelogs of release v1.2.4.11

* Docs : Remove old change logs

* docs : move Changelogs to top level

* Docs : Added Note for Semantic Versioning

* Docs : Note for past commit history

* docs : Note rephrase for past commits

* Docs : Adding Changelogs to doxygen input

* Docs: Remove Note annotation from Semantic Versioning

* Minor change : Removed extra top space from page

* Docs : Added previous release history

* Docs : Added note for commits before release v1.2.2

* Refactor page linking in nav bar

* Refactor : Note for previous release history

* Refactor : Truncate release history older than v 1.2.2.1

* Docs : remove page directive for Changelog