Lint: Check spelling on CI but don't fail

[hugovk]

• Check spelling on the CI, but don't fail the CI, so we can check output for PRs
• Fix a typo in the rendering system docs
• Add "dedented" and "falsy" to ignored words list: they're always fine
• Ignore the specific lines that contain "pullrequest", "ClassE", "inout": they're fine in those instances

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For reference, the remainder all look valid:

pep-0653.rst:596: stategy ==> strategy pep-0526.txt:467: undocummented ==> undocumented pep-0697.rst:340: retreive ==> retrieve pep-0665.rst:58: producting ==> producing, production pep-0642.rst:1702: recenty ==> recently pep-0205.txt:189: referencable ==> referenceable pep-0205.txt:213: referencable ==> referenceable pep-0205.txt:213: referencable ==> referenceable pep-0622.rst:2110: equilvalent ==> equivalent pep-0011.txt:45: plaforms ==> platforms pep-0582.rst:47: depenencies ==> dependencies pep-0683.rst:27: implmentation ==> implementation pep-0683.rst:706: speicific ==> specific pep-0426.txt:1287: overal ==> overall pep-0652.rst:245: aded ==> added pep-0677.rst:1023: ot ==> to, of, or, not pep-0677.rst:1118: compatiblity ==> compatibility pep-0701.rst:379: withing ==> within pep-0701.rst:439: withing ==> within pep-0285.txt:418: redability ==> readability pep-0708.rst:126: similiar ==> similar pep-0670.rst:524: retreive ==> retrieve pep-0689.rst:42: requring ==> requiring pep-0689.rst:133: exeption ==> exception, exemption pep-0691.rst:87: reponses ==> responses pep-0669.rst:118: Ancilliary ==> Ancillary pep-0669.rst:420: neglible ==> negligible pep-0674.rst:404: sufficently ==> sufficiently pep-0684.rst:674: allcoators ==> allocators pep-0690.rst:296: dictionay ==> dictionary pep-0706.rst:541: wth ==> with pep-0706.rst:572: dilligent ==> diligent pep-0554.rst:481: inteded ==> intended 

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📚 Documentation preview 📚: https://pep-previews--3080.org.readthedocs.build/

[CAM-Gerlach]

LGTM, though I'm not sure how many people will actually dig into the passing check output to see this. Would be more useful as a bot comment listing typos in changed files, or as non-gating check annotations with the same, but up to you if you want to go to that effort :)

[hugovk]

Yeah, could annotate like the CPython docs warning checker and only for changed PR files. Although I'm a little hesitant for spellchecker as sometimes it complains about valid spellings, and we might not want to spam those. But then again, it's only annotations and they can be added to the ignore lists.

Well, will consider for future work!