generating social media cards for each docs page

[2bndy5]

• uses a custom layout with the sphinx-social-cards extension
• removed unused docs' settings
• applied dynamic values to docs' configs
  • use importlib.metadata to get version for docs builds
  • use env var to set site_url (for RTD builds)
• revised all doc'd version changes to take advantage of sphinx-immaterial theme's new admonition style

Other non-doc updates

• updates pre-commit hooks versions
• replace pylint with ruff because we use mypy for type-checking
• added type hints where mypy expected an explicit Optional annotation
• cache pre-commit env in CI

[codecov[bot]]

Codecov Report

Merging #47 (01a38df) into master (3d3bc01) will increase coverage by 0.01%. The diff coverage is 100.00%.

:exclamation: Current head 01a38df differs from pull request most recent head 8da206b. Consider uploading reports for the commit 8da206b to get more accurate results

@@            Coverage Diff             @@
##           master      #47      +/-   ##
==========================================
+ Coverage   86.89%   86.90%   +0.01%     
==========================================
  Files          16       16              
  Lines        2465     2467       +2     
==========================================
+ Hits         2142     2144       +2     
  Misses        323      323              

Files Changed	Coverage Δ
circuitpython_nrf24l01/wrapper/__init__.py	100.00% <ø> (ø)
tests/conftest.py	100.00% <ø> (ø)
circuitpython_nrf24l01/fake_ble.py	97.57% <100.00%> (ø)
circuitpython_nrf24l01/network/mixins.py	76.45% <100.00%> (ø)
circuitpython_nrf24l01/network/structs.py	100.00% <100.00%> (ø)
circuitpython_nrf24l01/rf24.py	92.43% <100.00%> (ø)
circuitpython_nrf24l01/rf24_mesh.py	37.91% <100.00%> (ø)
circuitpython_nrf24l01/wrapper/cpy_spidev.py	90.62% <100.00%> (+0.62%)	:arrow_up:

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