feat: implement efficient(-ish) change detection for PolygonLayer & PolylineLayer

[JaffaKetchup]

The main aim of this change is to enable each element to update independently only when required.

The pre-projection and pre-simplification logic have been refactored into their own state which can be mixed in (and is to PolylineLayer and PolygonLayer).

Performance results:

• There is little overall change (perhaps +<1ms on UI/build)
• On the stress test, update times have not changed much, but may have increased a bit - as expected
• It is expected that in many cases, this will improve efficiency of updates, because only the elements that have updated will need to be re-projected and re-simplified
• TLDR; there should be some overall noticeable change, except for extremely large samples where all elements change at once, where the behaviour can be manually controlled instead (see below) - middle-size and smaller samples where only a couple elements change, or normal usage, should be better off (also see below)

Additionally, this fixes #1894. Unless useDynamicUpdate is disabled, in which case, Keys have been recommended to refresh the widget manually. This approach has been recommended in some cases: see the in-code docs.

The default simplificationTolerance has also been lowered to 0.3. This gives perfectly acceptable performance (very similar to 0.5 as before), but reduced visual artifacts.