* initial implementation * Update SocketForumChannel.cs * rest forum channel and remove message builder for 4.x * Update src/Discord.Net.Core/DiscordConfig.cs Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com> * Update src/Discord.Net.Core/Entities/Channels/IForumChannel.cs Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com> * Update src/Discord.Net.Core/DiscordConfig.cs Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com> * Update src/Discord.Net.Core/Entities/Channels/IForumChannel.cs Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com> * Update src/Discord.Net.Core/Entities/Channels/IForumChannel.cs Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com> * Update src/Discord.Net.Core/Entities/Channels/IForumChannel.cs Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com> Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>