[Feature]: Upload to buf registry command

[AlexsJones]

Checklist

• I've searched for similar issues and couldn't find anything matching
• I've discussed this feature request in the K8sGPT Slack and got positive feedback

Is this feature request related to a problem?

None

Problem Description

No response

Solution Description

In order for new contributors to understand how we update this remote schema on buf, we should include the command and the readme

Benefits

N/A

Potential Drawbacks

No response

Additional Information

No response