Formatter not registered for proto3 selector

[d-enk]

You can't configure buf for proto3

"[proto3]": {
  "editor.defaultFormatter": "bufbuild.vscode-buf"
},

Extension 'Buf' is configured as formatter but it cannot format 'Protocol-Buffers'-files

So if you have any other enabled extension for proto3 (like zxh404.vscode-proto3),
buf will not format.

[stefanvanburen]

Hi @d-enk, thanks for the issue. I'm able to reproduce, will take a look at your PR!