Support for SARIF format

Hi! When running the following command

`docker run -it --rm -v $(pwd):/data cytopia/eslint -f sarif .`

This error message appears:

```
There was a problem loading formatter: /usr/local/lib/node_modules/eslint/lib/cli-engine/formatters/sarif
Error: Cannot find module '/usr/local/lib/node_modules/eslint/lib/cli-engine/formatters/sarif'
Require stack:
- /usr/local/lib/node_modules/eslint/lib/cli-engine/cli-engine.js
- /usr/local/lib/node_modules/eslint/lib/eslint/eslint.js
- /usr/local/lib/node_modules/eslint/lib/eslint/index.js
- /usr/local/lib/node_modules/eslint/lib/cli.js
- /usr/local/lib/node_modules/eslint/bin/eslint.js
```

Start by reproducing the reported docker run command and checking the ESLint version and formatter path shown in the error. Trace how the image exposes ESLint formatters, then verify that the same command completes and produces SARIF output without the module-loading error.

Written by the indexing model from the issue text.