[CHA-1702] Add Future Channel Bans support

[totalimmersion]

Summary

Add support for the Future Channel Bans feature.

New Parameters

• ban_from_future_channels parameter in Channel#ban_user method
• remove_future_channels_ban parameter in Client#unban_user method

Usage

# Ban user from current channel and all future channels created by banner
channel.ban_user('user-id', ban_from_future_channels: true, reason: 'spam')

# Remove future channel ban (does NOT remove existing channel bans)
client.unban_user('user-id', 
  channel_cid: 'messaging:channel-id',
  created_by: 'banner-user-id',
  remove_future_channels_ban: true
)

# Query future channel bans
response = client.query_future_channel_bans(
  filter_conditions: { created_by_id: 'banner-user-id' }
)

Related PRs

• Backend: https://github.com/GetStream/chat/pull/11390

Linear

• CHA-1702

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