Release Notes for 466

Improved streaming garbage collection handling of mechanisms.

Added new events to RunService for easily hooking into the Roblox task pipeline.

Tweaking a few material physics properties with respect to collision handling:

1. friction weights: GLACIER_MATERIAL -> 2.0 SNOW_MATERIAL -> 3.0 MUD_MATERIAL -> 3.0 LEAFYGRASS_MATERIAL -> 2.0 PAVEMENT_MATERIAL -> 0.3

2. Elasticity weights: PEBBLE_MATERIAL -> 1.5 GRASS_MATERIAL -> 1.5 SAND_MATERIAL -> 2.5 SNOW_MATERIAL -> 4.0 MUD_MATERIAL -> 4.0 LEAFYGRASS_MATERIAL -> 2.0

Made UDim, Rect, and NumberRange PropertyItem expanded components sort by constructor order instead of alphabetically

Added new icons for default asset folders in asset manager

Add a new UIStroke object for applying outlines to text and UI borders

Added a readonly "Content" property on text object which will show raw string that gets displayed onto screen. When richtext is enabled, this will show string with all format tags stripped.

Default Animation Thumbnail shown on animation export

Clouds level of detail adaption based on Quality Level.