refactor(llc, core): Improve query sorts and provide defaults.

[xsahil03x]

Description of the pull request

This pull request aims to redesign sorting to be type-safe with IDE assistance. The new system uses ComparableField to handle comparison between different value types and introduces extension types like UserSortKey and ChannelSortKey for better discoverability. This ensures the same sorting logic works client-side and server-side while catching errors at compile-time instead of runtime.

[codecov]

Codecov Report

Attention: Patch coverage is 70.53571% with 33 lines in your changes missing coverage. Please review.

Project coverage is 61.49%. Comparing base (0e56281) to head (8b73b52).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...r_core/lib/src/stream_channel_list_controller.dart	0.00%	8 Missing ⚠️
...er_core/lib/src/stream_member_list_controller.dart	0.00%	7 Missing ⚠️
...core/lib/src/stream_poll_vote_list_controller.dart	0.00%	7 Missing ⚠️
...tter_core/lib/src/stream_user_list_controller.dart	0.00%	7 Missing ⚠️
...stream_chat/lib/src/core/models/channel_model.dart	0.00%	2 Missing ⚠️
...lib/src/stream_message_search_list_controller.dart	0.00%	1 Missing ⚠️
...stence/lib/src/stream_chat_persistence_client.dart	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2188      +/-   ##
==========================================
+ Coverage   61.44%   61.49%   +0.05%     
==========================================
  Files         386      388       +2     
  Lines       24325    24392      +67     
==========================================
+ Hits        14947    15001      +54     
- Misses       9378     9391      +13     

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