* Use `curly_braces_in_flow_control_structures` for `material`

* include test/material

* add back removed comments

Show `RefreshIndicator` on top when scroll's axis direction is up (matching native behaviour) (#93779)

Add ability to control RefreshProgressIndicator's distance from edges.

* update dependencies when widget configuration changes

Co-authored-by: altherat <contact@altherat.com>

* migrate material to nullsafety

* address review comments

* address review comments

* fix build

* add language version 2.8 in packages/flutter

* enable non-nullable analyzer flag

This reverts commit 602ac0bc.

* implicit-casts:false in flutter/lib/src/material

* address review comments

* Update project.pbxproj files to say Flutter rather than Chromium

Also, the templates now have an empty organization so that we don't cause people to give their apps a Flutter copyright.

* Update the copyright notice checker to require a standard notice on all files

* Update copyrights on Dart files. (This was a mechanical commit.)

* Fix weird license headers on Dart files that deviate from our conventions; relicense Shrine.

Some were already marked "The Flutter Authors", not clear why. Their
dates have been normalized. Some were missing the blank line after the
license. Some were randomly different in trivial ways for no apparent
reason (e.g. missing the trailing period).

* Clean up the copyrights in non-Dart files. (Manual edits.)

Also, make sure templates don't have copyrights.

* Fix some more ORGANIZATIONNAMEs

Make FlutterError objects more structured so they can be displayed better in debugging tools such as Dart DevTools.

* add trailing commas on list/map/parameters

* add trailing commas on Invocation with nb of arg>1

* add commas for widget containing widgets

* add trailing commas if instantiation contains trailing comma

* revert bad change

* Make progress indicators accessible