add Real input to a few more sketching actions

[jonahrb]

@RobPasMue I missed a few locations for allowing Real input - this PR addresses some of those that I found

• Real input for extrude_sketch()
• Real for Sketch().circle(), ellipse, polygon, gears
  • all input validation for these are already handled in the sketch objects themselves

Didn't write any unit tests for these because it's already handled at lower level, and tests still all pass anyway :)

[RobPasMue]

LGTM! One minor comment

[jonahrb]

@RobPasMue pushed new changes for translating bodies :)

[RobPasMue]

LGTM!