core: add pagination and update example (#222)

* fix: use data not used on setUser

* feat: add pagination management to core feed bloc

* feat: update and expand core example

* docs: update CHANGELOG

* fix ci

* ui kit: bump depedency

* bump dev dependencies

* github action build workflow: channel stable

* ui kit: fix full screen media test

* ui kit: fix debug fill properties test

* ui kit: fix FlatActivityListPage test

* fix test: !timersPending exception
A Timer is still pending even after the widget tree was disposed.

* fix flat feed core test

* bloc: queryPaginatedReactions wip

* loadMoreReactions wip

* test bloc.queryPaginatedReactions

* Aggregated Feed: Paginated Activities (#219)

* aggregated feed builder wip

* loadMoreGroupedActivities

* fix analyzer

* internal annotation

* update todo

* make NextParams const

* apply reviews

* test queryPaginatedGroupedActivities wip

* clean up a bit + aggregated feed test passing

* format

* onAddActivityGroup + getEnrichedActivityDetail
+onRemoveActivityGroup

* test AggregatedFeedCore

* test getEnrichedActivity

* format

* test onAddActivityGroup

* feat: add refresh to feed bloc and other fixes

* feat: add flags to paginated results

* fix: nested child reactions now reactive

* fix fileExt extension for .mov

* fix linter issues

* time parameter in onAddActivity

* ImagePreview: fix typo in error message

* make GenericFeedBloc immutable

* make GenericFeedBloc immutable

* fix: add missing pubspec file

* test: fix missing flags argument

* chore: fix linter warnings

* chore: avoid print

* test: update

* chore: fix lints

* chore: remove late keyword

* remove activity and lookupAttr

* feat: add core build context extensions

* docs: expand core example

* format

* chore: update example

* format

* fix bloc test

* format

* update llc and faye changelogs

* faye: version bump

* update pubspec and tweak changelog

* llc: tweak changelog + bump pubspec version

* workflow: reduce min_coverage constraint

* tweak changelog

* update version header in llc

* version bump

Co-authored-by: Sacha Arbonel <sacha.arbonel@hotmail.fr>

fix: feed bloc query and add activities (#207)

Co-authored-by: Sacha Arbonel <sacha.arbonel@hotmail.fr>

0.7.0 release (#205)

Merge pull request #185 from GetStream/remove-token-from-constructor

Merge pull request #184 from GetStream/develop

Merge pull request #175 from GetStream/upload-core

Merge pull request #167 from GetStream/support-extraData-null-value

Merge pull request #160 from GetStream/release-0.4.0

Merge pull request #134 from GetStream/release-0.3.0

Merge pull request #121 from GetStream/release-0.2.3