feat: enable config to set channel to private

[diegofesanto]

What kind of change does this PR introduce?

feature

What is the current behavior?

It doesn't have the option to set channel to private

What is the new behavior?

• Enable config to set channel to private
• Enable replay on broadcast if the channel is private

Additional context

• Related to Enable private broadcast #59

[SLOSK]

I need this as well so I thought I would try to put in some effort. I was not able to get it working, but one bit of feedback...

I think there should be a default for channel options:

using a public channel:

var channel =
                    SupabaseClient.supabase
                        .Realtime
                        .Channel($"test");

using a private channel:

        ChannelOptions channelOptions = new ChannelOptions(
            SupabaseClient.supabase.Realtime.Options,
            () => SupabaseClient.supabase.Auth.CurrentSession.AccessToken,
            SupabaseClient.supabase.Realtime.SerializerSettings,
            true
        );

        var channel =
                    SupabaseClient.supabase
                        .Realtime
                        .Channel($"test", channelOptions);

I needed to look at the Channel(channelName) overload to see what the defaults are and recreate them.

As for the feature itself. Not sure why mine is failing. I am getting: "RealtimeException: {"ref":"eab379c2-0025-4721-bf1d-2faf105955dd","event":"phx_reply","payload":{"status":"error","response":{"reason":"Unauthorized: You do not have permissions to read from this Channel topic: test"}},"topic":"realtime:test"}"

Let me know if I can help out further in anyway, but for my own needs I'll use http to access broadcasts.