[Doc] TCR create and updation.

[pallabez]

Issue Description

Create doc for TCR creation and updating process

Expected Behavior

• Explain TCR
• Rules regrading TCR
• Steps to create TCR
• Process to updating TCR

Current Behavior

NA

Severity/Priority

• Critical
• High
• Medium
• Low

Additional Information

Checklist

• I have read and followed the project's code of conduct.
• I have searched for similar issues before creating this one.
• I have provided all the necessary information to understand and reproduce the issue.
• I am willing to contribute to the resolution of this issue.