Add `test_generic.cc` to docs gen, and rename `docs/gen/chformal` to the more generic `docs/gen/raw_commands` (in line with `docs/gen/raw_cells`).
Add `test_generic.cc` to docs gen, and rename `docs/gen/chformal` to the more generic `docs/gen/raw_commands` (in line with `docs/gen/raw_cells`).