Release Notes for 557

• fixes a crash happening with some cases when using IKControls

Improved how assembly root parts are calculated. Part sizes are no longer quantized to 1/50 studs^2 when determining which part in an assembly is the "biggest" to be considered the root part.

Added beta feature for string interpolation, a way to create formatted strings in Luau without needing to call string.format.

Added Vector3:Max and Vector3:Min to Luau typings.

Improves formatting of type unions by serializing type unions of nil's as a single nil instead of ?

Fixed a null pointer exception in type normalization.

Removes memory_apsgpu (GPU Allocations per second) in memory counters. These counters were not being recorded correctly and will remain removed until fixed.

Fixed a performance issue with gizmos if you have never pressed Tab.

Fix issue with docked panels having extra vertical space when docked in the central document area.

The properties window will no longer clear the search filter when you select a new instance.

Fix a regression where the I-beam cursor in TextBox uses TextStrokeColor3 instead of TextColor3