feat: pyclipper -> pyclipr

[oliverfunk]

Linked Issues

Closes #3197

Description

Moves to the new pyclipr package based on Clipper2 for the fallback offsetting library.

Interface Changes

None, only internal api's.

Checklist

I confirm that I have completed the following checks:

• Tests run locally and pass pytest tests --reactor
• Code quality checks run locally and pass pre-commit run --from-ref develop --to-ref HEAD
• Documentation built locally and checked sphinx-build -W documentation/source documentation/build

[oliverfunk]

3 problems:

• Seemingly cannot set Miter limit
• The accuracy of the returned offset no longer passes the "isclose" checks unless the precision is reduced
• Pclippr does not return None for invalid geometry, it no longer fails, which means one of the tests fails because of it

also:
The docs need to be updated
Dep needs to be added

[je-cook]

Cool! how do you feel about the package, good change?

[oliverfunk]

I've realised after testing, this seemingly cannot do negative offsets.

[sonarqubecloud]

Quality Gate failed

Failed conditions
C Reliability Rating on New Code (required ≥ A)

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