output: support structured (JSON) output for other application parsing

--output.json
--output.text
--output.html

Refer to `golangci-lint run -h`

<img width="1978" height="1367" alt="Image" src="https://github.com/user-attachments/assets/3003df86-d994-4213-8c2e-7a4b78cdc247" />