Add previously documented features and bugs to the backlog

[gayanSandamal]

Do this in background

[dineshdoluweera]

Added 20 New features from our previously documented list to git backlog and highlighted the features on the list to clarify.

• Blue - Added to Git Backlog
• Yellow - Already exists on App https://docs.google.com/document/d/1cnpUcUxHlNF4ESlkIMplpnRtXU9BymffezLDzoQ7avI/edit?tab=t.0