process interpret for small scale simulations

[Nic30]

In future we can use e.g. Verilator for simulations of large designs, however there will be always some small designs where compilation would take just too much time.

The interpret would be useful as it can be also extended to perform dynamic analysis etc. However there is a still question if this functionality should be rather implemented as extension of Verilator or as a library based on netlistDB.