[web] Added support for callID

[EvanBacon]

Why

• fixes "test" example - all boxes animate across the screen
• fixes "interpolate" example - now boxes don't jitter when you drag them
• fixes "colors" example - now colors interpolate smoothly rather than snap to highest RGB
• fixes "image viewer" example - no more jittering when the user stops panning
• fixes snapping to edges in "chat heads" example - doesn't fix the bug where other chat heads don't follow the main one
• changes "different spring configs" to go from jittery circles to not moving circles (¯\_(ツ)_/¯)
• doesn't fix any of the interactable examples

How

Adding more JS support for the features added by this PR #354 we should be more careful in the future not to add native-only features.

Issue:

[osdnk]

Left some notes, but nothing's blocking.