Feature Providing the available commands and the correct usage of a command.

[Adam]

There isn't a !help or !commands command to output all the available commands, so i suggest adding one, it shouldn't be hard at all.

- a simple !help command example:

<User>: !help
<Sinusbot>: available commands: !play !prev !search !qyt !qytdl !yt !ytdl.. etc..


- If a user executes an invalid sinusbot command, it should show him the correct usage, i.e:

<User>: !search
<Sinusbot>: Usage: !search <searchstring>


- Optionally, a user can ask for more detail about a command, i.e:

<User>: !help !qytdl
<Sinusbot>: Usage !qytdl <url>
<Sinusbot>: Enqueue an <url> via external youtube-dl (if enabled); beware: the file will be downloaded first and played back afterwards, so there might be a slight delay before playback starts; additionally, the file will be stored.

Thank you.