The pubRoot directory interface is being changed to promote adding and removing directories

Add `fromDirectional` factory to `RelativeRect` for when an app needs to consider both TextDirection.ltr and TextDirection.rtl.

```
RelativeRect.fromDirectional(
    textDirection: textDirection,
    start: 10.0,
    top: 20.0,
    end: 30.0,
    bottom: 40.0,
);
```

Addresses https://github.com/flutter/flutter/issues/107058.

* Pass URI converter from context to DDS

* Match change that will be merged

* Revert SDK web change

* Ensure build is done in incremental mode.

This allows for faster bootstrapping of the compiler from previously created dill file.

Fixes https://github.com/flutter/flutter/issues/107183

* Avoid initializeFromDill in aot mode

* Update tests

* Add build-after-edit benchmark

* Clean up analyzer warnings

* Restore line break

Co-authored-by: Bruno Leroux <bruno.leroux@gmail.com>

Properly merges the TextSpan.style of SelectableText.rich.

* Revert "Reland "Clipping if only one character text overflows (#99146)" (#102130)"

This reverts commit 3f43d9f3.

* Revert "Implement frameData for TestWindow (#105537)"

This reverts commit 21841d7e.