Remove NavigationToolbar condition that leading widget cannot be larger than 1/3 the total space available. (#112548)

Update FileImage to use the new ImmutableBuffer.fromFilePath constructor to avoid loading bytes through the Dart heap. As a side effect, tis fixes #112881 which prevents dart:io from opening a file larger than INT_MAX bytes on windows.

For files that are not exactly a dart:io file, we still use the old method of calling loadBytes() in order to not make this a breaking change.

Fixes scrolling by dragging a selection when the field is in a Scrollable.

When updating packages, do not delete the simulated SDK directory until all pub invocations have finished (#112975)

Enables pinch-to-zoom in InteractiveViewer on web via PointerScaleEvent.

Export `elapseBlocking` to test binding, so slow sync work can be simulated such as a slow widget build (#112619)

* Adding snackbar theme data width field

* Whitespace formatting

* Update docstrings

* version update

* tidy up

* Revert auto text formatting

* Text formatting

* Remove whitespace

* Test tidy

* Whitespace fix

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* whitespace

* test fixes

* de-British-ification

* comment modification