Fix and improve path intersection methods

- Add path.intersectsBeam() method
- Add utils.beamIntersectsLine() method
- Simplify calculation and improve precision on beam intersections
- Document return types properly
- beamIntersectsCurve now uses the proper function from Bezier library instead of emulating it by constructing a huge line
- docs: path.intersect... methods never return false, they simply return an empty array in case of no intersection

sites/dev/docs/reference/api/path/intersectsy/readme.mdx

@@ -17,7 +17,7 @@ for more information.
 ## Signature
 
 ```js
-array|false path.intersectsY(float y)
+array path.intersectsY(float y)
 ```
 
 ## Example