Add triangle enumeration examples for new Java API

Adds two triangle enumeration jobs for the new Java API, a basic version and an optimized version with degree computation.
The jobs are written such that parameters input and output parameters are optional. If no parameters are given, the job runs on default data and writes to standard out.

Requires PRs #565 and #578 

To be done (all resolved):
- ~~Set DOP~~
- ~~Integrate CSV output format~~