Migrate buf config to version 2

[havan]

This migrates the buf's config version to v2.

Warning

You may need to update your buf cli tool to latest version

[mo-c4t]

You moved buf.yaml to the root folder and you set the path to proto inside. I think there should be a change in ci.yaml workflow, to remove proto from the command: Example : buf format proto should be buf format

[havan]

You moved buf.yaml to the root folder and you set the path to proto inside. I think there should be a change in ci.yaml workflow, to remove proto from the command: Example : buf format proto should be buf format

The config migrate script moved it. But we don't have any protobuf files other than the proto folder. So, I think it should stay, wdyt?