Cura 10811 improve smooth

[casperlamboo]

This includes updated fluid motion logic. A new definition of fluid motion is introduced, here a tool-path-part is considered to be fluid if all of the following criterial hold a) Vectors [A,B] and [C,D] are "long" (settable through settings) b) Vector [B,C] is "short" (settable through settings) c) either on the angles between vectors

• [A,D] and [B,C] or,
• [A_,B] and [B,C] or,

• [B,C] and [C,D_] is below a threshold (settable through the settings)

           B--C
          /    \
         A_     D_
        /        \
       /          \
      A            \
                    \
                     D

Unit tests are added, both to show intent of the isSmooth predicate and to test against future regressions.

Cura-10811

[github-actions[bot]]

Unit Test Results

26 tests   26 :heavy_check_mark:  18s :stopwatch:   1 suites    0 :zzz:   1 files      0 :x:

Results for commit 023037a0.

:recycle: This comment has been updated with latest results.

[jellespijker]

@casperlamboo might be best if you close this PR and open a new one. The Workflow should be disabled now