[Autogen docs] Notebooks for bloqs/rotations modules

[matthagan15]

Addresses documentation issues being tracked in https://github.com/quantumlib/Qualtran/issues/978. This is the same code as this pull request (https://github.com/quantumlib/Qualtran/pull/1016) but addressed the comments in there. I had to create this new pull request because I forgot to create the request from the branch I was working on and wanted merging down the line to be easier. Essentially these changes are minor modifications to the documentation for three bloqs modules:

• qualtran/bloqs/rotations/phase_gradient.py
• qualtran/bloqs/rotations/hamming_weight_phasing.py
• qualtran/bloqs/rotations/programmable_rotation_gate_array.py

and adds relevant autogenerated notebooks for Bloqs contained in these modules. Fixes the formatting and "dead cells" issues from the previous pull request.

[mpharrigan]

hi, there's still an error in the notebooks (see CI check)