fix so that animations run when played again even after finishing

[hanbollar]

Linking

Fixes #613

Problem

if a user wants to retrigger an animation to play, the animation wouldnt do it since the sequence needed to be reset first

Solution

sets it based on play - whenever that's started, entire animation resets even if it's in the middle of an animation sequence

Breaking Change

nope

Notes

see the linked issue

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Required to Merge

• [x] PASS - all necessary actions must pass (excluding the auto-skipped ones)
• [x] TEST IN HEADSET - main dev-testing-example and any of the other examples still work as expected
• [x] VIDEO - if this pr changes something visually - post a video here of it in headset-MR and/or on desktop (depending on what it affects) for the reviewer to reference.

https://github.com/Volumetrics-io/mrjs/assets/19377312/94bdfe5f-2145-46a4-bc9e-9cd70e25be42

• [x] TITLE - make sure the pr's title is updated appropriately as it will be used to name the commit on merge - [ ] BREAKING CHANGE
  • DOCUMENTATION: This includes any changes to html tags and their components
  • make a pr in the documentation repo that updates the manual docs to match the breaking change
  • link the pr of the documentation repo here: #pr
  • that pr must be approved by @lobau
  • SAMPLES/INDEX.HTML: This includes any changes (html tags or otherwise) that must be done to our landing page submodule as an effect of this pr's updates
  • make a pr in the mrjs landing page repo that updates the landing page to match the breaking change
  • link the pr of the landing page repo here: #pr
  • that pr must be approved by @hanbollar

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