Add/support SystemVerilog

[mithro]

Create good support for SystemVerilog.

• Add Surelog bazel rules #132
• Add UHDM bazel rules #133
• Add systemverilog-plugin from chipsalliance/yosys-f4pga-plugins #134

[mithro]

We need the Surelog->UHDM->Yosys flow here.

FYI - @QuantamHD