Implemented path recognizer for recognizing along an SVGpath

[OpherV]

feat: path recognizer for recognizing along an SVGpath

Implement a recognizer that receives an SVG element and an SVG Path element, and recognizes a user following the path. Recognizer will fail if user starts gesturing at the middle of the path, veers too far from the path or stops input mid-way.

Special parameters:
resolution (default 10) - path will be quantized to this amount of segments
maxDistanceFromSegment (default 30) - the threshold in which input is allowed to stray from the path
Example use case: games where the player needs to follow an onscreen shape to achieve a goal.

Includes a pathRecognizer test in the manual tests dir.

[runspired]

@arschmitz this is really interesting, at first I thought perhaps this was outside the scope of the core lib, but the more I think about it the more I'd love to see something like this within the lib itself.

[arschmitz]

@runspired i actually totally agree iv been going back and forth with my self over this one but im leaning towards inclusion

[OpherV]

@runspired @arschmitz Actually if I had the option I would have written it as a separate module and not as a PR to the hammer core. However after looking at the architecture currently there's no good way to add new recognizers dynamically to hammer.