Add codespell support (config, workflow to detect/not fix) and make it fix some typos

[yarikoptic]

More about codespell: https://github.com/codespell-project/codespell .

I personally introduced it to dozens if not hundreds of projects already and so far only positive feedback.

CI workflow has 'permissions' set only to 'read' so also should be safe.

Overall summary with counts of what was fixed (ran before fixes introduced)

      1 attribure ==> attribute
      1 betwenn ==> between
      1 correspondance ==> correspondence
      1 detailled ==> detailed
      1 fot ==> for, fit, dot, rot, cot, got, tot, fog
      1 heigth ==> height
      1 inthe ==> in the
      1 lenght ==> length
      1 minimzing ==> minimizing
      1 optionnaly ==> optionally
      1 overlayed ==> overlaid
      1 recommanded ==> recommended
      1 shorcuts ==> shortcuts
      1 wich ==> which
      2 cacheing ==> caching
      2 currenty ==> currently
      2 discared ==> discarded, discard
      2 reduceable ==> reducible
      2 responsability ==> responsibility
      2 typicall ==> typically, typical
      3 specifiction ==> specification
      4 explicitely ==> explicitly
     86 overriden ==> overridden

[zm711]

I support this in general, but I would still defer this to @rossant since I don't have enough time to support this repo currently.