OCaml package documentation

1. hardcaml
2. hardcaml_circuits
3. hardcaml_step_testbench
4. hardcaml_verify
5. hardcaml_verilator
6. hardcaml_video_codecs
7. hardcaml_waveterm
8. hardcaml_xilinx
9. ppx_deriving_hardcaml
10. reedsolomon
11. zprize