Add support for SARIF export format

**Is your feature request related to a problem? Please describe.**
With [SARIF](https://sarifweb.azurewebsites.net/) it would be possible to [upload results to Code Scanning in GitHub](https://docs.github.com/en/code-security/code-scanning/integrating-with-code-scanning/uploading-a-sarif-file-to-github).

**Describe the solution you'd like**

```shell
icode my-project -f sarif -o output.sarif
```

**Describe alternatives you've considered**
Alternative way would be to build SARIF manually based on the XML report.

**Additional context**
None.