* Add tests for baseline alignments
* Merge baseline alignment algorithm to the main stack algorithm
- Baseline alignment is now part of the main stack algorithm.
- ASStackBaselinePositionedLayout is no longer needed and removed.
* All snapshot test cases of ASStackLayoutSpec are passing now
* Remove baselineRelativeArrangement
* Remove TODO
* Minor fixes in cross size determination step
* Add test case for TextKit truncation style
* Add fast path for text node measurement with default truncation
* Use fast path more often
* Reverse options order
* Simplify implementation – no functional change
* Share "isScaled" variable
* Intersect with constrained rect
* Add a failing test case for fast-path truncation
* Add some more truncation tests, using slow path as reference image
* Update the tests
* In ASTextKitRenderer, intersect bounds with constrained rect
* Add test case for TextKit truncation style
* Add fast path for text node measurement with default truncation
* Use fast path more often
* Reverse options order
* Simplify implementation – no functional change
* Share "isScaled" variable
* Intersect with constrained rect
* Add a failing test case for fast-path truncation
* Add some more truncation tests, using slow path as reference image
* Update the tests
* In ASTextKitRenderer, intersect bounds with constrained rect
* Use maximumNumberOfLines property in text kit fast path
Add reference images
Disable fast-path for max-one-line case
* Remove unneeded snapshot files
