gnu: python-attrs: Update to 23.2.0.

* gnu/packages/python-xyz.scm (python-attrs): Update to 23.2.0.
[build-system]: Use pyproject-build-system.
[arguments]: Remove custom 'check phase.
[native-inputs]: Remove python-coverage, python-hypothesis, and python-six;
add python-hatchling, python-hatch-fancy-pypi-readme, python-hatch-vcs,
python-pytest-xdist, and python-zope-interface.
(python-attrs-bootstrap)[native-inputs]: Add python-hatchling,
python-hatch-fancy-pypi-readme, python-hatch-vcs.

Change-Id: I19f99b38589db7de0f6a78d6e0f126118dbe2b1d

gnu: Add python-nbclassic.

* gnu/packages/jupyter.scm (python-nbclassic): New variable.

Change-Id: I8be60400df0cb54284c5b0d40d383c95591016c0

gnu: Add python-notebook-shim.

* gnu/packages/jupyter.scm (python-notebook-shim): New variable.

Change-Id: I1ed71ea39b37f066c64d3f256a24366055dc7aaa

gnu: Add python-pytest-jupyter.

* gnu/packages/jupyter.scm (python-pytest-jupyter): New variable.

Change-Id: Id8d59a3981c5c46adbfee7d369692cba32e27d70

gnu: Add python-hatch-jupyter-builder.

* gnu/packages/jupyter.scm (python-hatch-jupyter-builder): New variable.

Change-Id: I5bdf00a95dd6260eb5f6066a77394054bcec0ca4

gnu: Add python-overrides.

* gnu/packages/python-xyz.scm (python-overrides): New variable.

Change-Id: I43f613195879ea6cdd5174daadb5e5c35569e534

gnu: Add python-fqdn.

* gnu/packages/python-xyz.scm (python-fqdn): New variable.

Change-Id: If0355f15374ee7db23bfb54eb682575e59708d05

gnu: Add python-uri-template.

* gnu/packages/python-xyz.scm (python-uri-template): New variable.

Change-Id: I2ff3995bc5741da0147a335c5f14f169a8001153

gnu: Add python-isoduration.

* gnu/packages/python-xyz.scm (python-isoduration): New variable.

Change-Id: I3503ea0baf6a73a9b3c19ab616127ce5df1ed827

gnu: Add python-rfc3986-validator.

* gnu/packages/python-xyz.scm (python-rfc3986-validator): New variable.

Change-Id: If63c2d8798bc8efd021e6ab008cd5017b3dc7fd1

gnu: Add python-jsonschema-specifications.

* gnu/packages/python-xyz.scm (python-jsonschema-specifications): New variable.

Change-Id: If1f7fa0d4e0bc505d9378ce892af298365754daf

gnu: Add python-referencing.

* gnu/packages/python-xyz.scm (python-referencing,
python-referencing-bootstrap): New variables.

Change-Id: I16b9d32644204a72c46a2d51ebf3771d90cd099a

gnu: Add python-pep440.

* gnu/packages/python-xyz.scm (python-pep440): New variable.

Change-Id: I307eb0d50e5e6378fb840b775964761833cb9488

gnu: python-rich: Remove python-ipywidgets.

This is done to avoid unnecessary dependency cycles involving jupyter.

* gnu/packages/python-xyz.scm (python-rich)[arguments]: Disable some tests.
[propagated-inputs]: Remove python-ipywidgets.

Change-Id: I7a514ea7647086dc6f831c1167c28d145130cfa1

gnu: python-nbconvert: Add missing texlive inputs.

* gnu/packages/python-xyz.scm (python-nbconvert)[propagated-inputs]: Add
texlive-amsmath, texlive-etoolbox, texlive-infwarerr, and texlive-kvoptions.

Change-Id: Id3c93afc9c459e65e1a2e88cc91b4ceac07007ec

gnu: python-nbclient: Add Setuptools and Wheel.

* gnu/packages/jupyter.scm (python-nbclient)[native-inputs]: Add
python-setuptools and python-wheel.

Change-Id: I0c203c2545587c45f5878c5772c29d49c7939811

gnu: python-openpyxl: Add Setuptools and Wheel.

* gnu/packages/python-xyz.scm (python-openpyxl)[native-inputs]: Add
python-setuptools and python-wheel.

Change-Id: I38368e62af3ab117141cd42bf8181fdb5b1f59fb

gnu: python-jinja2: Add setuptools and wheel.

* gnu/packages/python-xyz.scm (python-jinja2)[native-inputs]: Add
python-setuptools and python-wheel.

Change-Id: Iccf3ee9014f581792c9fdef9d6be7e8af3d9c9b4

gnu: python-pytest-xdist: Add setuptools and wheel.

* gnu/packages/check.scm (python-pytest-xdist)[native-inputs]: Add
python-setuptools and python-wheel.

Change-Id: I0aa7130a6e1bc0741edb164fd145bc20d754c007

gnu: snakemake-6: Add Setuptools and Wheel.

* gnu/packages/python-xyz.scm (snakemake-6)[native-inputs]: Add
python-setuptools and python-wheel.

Change-Id: I129616694f09763561913cd8939dd2de46e6df51