feat(llc, core, ui, localization): threads v2

[xsahil03x]

This pull request introduces several new features and improvements to the stream_chat package, primarily focusing on enhancing thread management capabilities and optimizing event handling. Below is a summary of the most important changes:

New Features:

• Added support for Threads v2, allowing users to query all threads. (packages/stream_chat/CHANGELOG.md)
• Introduced methods to mark threads as read or unread in both Channel and StreamChatClient classes. (packages/stream_chat/lib/src/client/channel.dart, packages/stream_chat/lib/src/client/client.dart) [1] [2]
• Added queryThreads, getThread, and partialUpdateThread methods to StreamChatClient for enhanced thread management. (packages/stream_chat/lib/src/client/client.dart)

Event Handling Improvements:

• Changed _eventController from BehaviorSubject to PublishSubject for more efficient event handling. (packages/stream_chat/lib/src/client/client.dart)
• Updated event subscription logic in ClientState to handle new thread-related events and improve user state updates. (packages/stream_chat/lib/src/client/client.dart)

Thread Query Options:

• Introduced ThreadOptions class for specifying options when querying threads, including limits on replies, participants, and members. (packages/stream_chat/lib/src/core/api/requests.dart)

API Enhancements:

• Added ThreadsApi to the StreamChatApi class for dedicated thread operations. (packages/stream_chat/lib/src/core/api/stream_chat_api.dart)
• Implemented serialization for ThreadOptions and updated PaginationParams to support conditional fields. (packages/stream_chat/lib/src/core/api/requests.g.dart) [1] [2]

These changes collectively enhance the functionality and performance of the stream_chat package, particularly in handling and managing threads.

[codecov]

Codecov Report

Attention: Patch coverage is 37.01149% with 548 lines in your changes missing coverage. Please review.

Project coverage is 59.91%. Comparing base (bc4126b) to head (839b4b3).

Files with missing lines	Patch %	Lines
...core/lib/src/stream_thread_list_event_handler.dart	0.00%	120 Missing ⚠️
...er_core/lib/src/stream_thread_list_controller.dart	0.00%	108 Missing ⚠️
...ckages/stream_chat/lib/src/core/models/thread.dart	0.00%	66 Missing ⚠️
..._flutter/lib/src/theme/thread_list_tile_theme.dart	20.48%	66 Missing ⚠️
...ew/thread_scroll_view/stream_thread_list_view.dart	1.66%	59 Missing ⚠️
...m_chat/lib/src/core/models/thread_participant.dart	0.00%	24 Missing ⚠️
packages/stream_chat/lib/src/client/client.dart	50.00%	17 Missing ⚠️
...ages/stream_chat/lib/src/core/api/threads_api.dart	0.00%	17 Missing ⚠️
.../stream_chat_flutter/lib/src/utils/extensions.dart	14.28%	12 Missing ⚠️
...ages/stream_chat/lib/src/core/api/channel_api.dart	0.00%	10 Missing ⚠️
... and 13 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2076      +/-   ##
==========================================
- Coverage   60.81%   59.91%   -0.91%     
==========================================
  Files         361      372      +11     
  Lines       22018    22766     +748     
==========================================
+ Hits        13391    13641     +250     
- Misses       8627     9125     +498     

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