Update Agent README.md

[NISH1001]

Things:

• Instead of what the agent role is, put how the agent can be used in other system (say chatgpt via mcp)

Questions:

• where will artifacts reside? Maybe only in the same akd wiki repo is better for navigability

[NISH1001]

@rohit-sahoo @sanzog03 @muthukumaranR
put your ideas here for this as well and we can collaborate what to do for public release