pmd integration

[Meemaw]

It would be nice if reviewdog supported pmd. It has very similar report format as checkstyle, so it should not be too hard.

[haya14busa]

PR is welcome.

[csware]

PMD supports the SARIF format since 6.31.0 (released in January 2021)

[puhaiyang]

Yes,PMD can be used in SARIF format.
I have written an example tutorial, you can refer to this link.
reviewdog+PMD+java+CICD

And,this issues can be closed.