Effects: Rewrite

1. Introduces a set of helper methods to easily create and define new effects.
2. Uses clip animations and placeholders instead of wrappers for clip effects.
3. Ensures all animations are detectable as animated

Fixes #10599
Fixes #9477
Fixes #9257
Fixes #9066
Fixes #8867
Fixes #8671
Fixes #8505
Fixes #7885
Fixes #7041

Closes gh-1017