Convert `Animatable` to `Animation type` prop definition field

[cdoublev]

• fixes #521
• replaces all occurrences of Animatable with Animation type as a property definition field
• replaces no with not animatable (as an Animation type value)
  • isolation edit: replaced with discrete (see following comment and https://github.com/w3c/fxtf-drafts/commit/402eece3e43edb5f52ac9a6c21f6e62bf2ed913d)
• replaces no with discrete
  • background-blend-mode, mix-blend-mode
  • fill-break, stroke-break
  • fill-origin, stroke-origin
  • fill-repeat, stroke-repeat
  • fill-rule
  • stroke-align
  • stroke-dash-justify
  • stroke-linecap
  • stroke-linejoin
  • stroke-miterlimit
• replaces as repeatable list of integers with by computed value
  • stroke-dashoffset
• replaces as repeatable list of * with as repeatable list
  • fill-image, stroke-image
  • fill-position, stroke-position
  • fill-size, stroke-size
  • stroke-dasharray
• replaces as color with by computed value
  • fill-color, stroke-color
• replaces as <length-percentage> with by computed value
  • stroke-width
• replaces as number with by computed value
  • fill-opacity, stroke-opacity
• replaces yes, if <length> with by computed value if <length>, otherwise discrete
  • stroke-dash-corner
• replaces yes with See prose in Animation of Filters
  • backdrop-filter

[birtles]

Thanks for doing this. The only one I'm not sure about is isolation. Due to https://drafts.csswg.org/web-animations-1/#side-effects-section, animating to isolation: auto with a fill mode of after or both would not have the desired effect.

[w3cbot]

svgeesus marked as non substantive for IPR from ash-nazg.