Make `+together` command display list of available names dynamically

[Jorgen1040]

Using the new DiscordTogether.default_choices in 1.1.2 (see #52) to display the full list not hardcoded. See attached portion of code for what needs to be changed:

jassa-bot/src/bot.py

Lines 235 to 243 in 7542a56

	@together.error
	async def together_error(ctx, error):
	if isinstance(error, commands.MissingRequiredArgument):
	await ctx.message.add_reaction(no)
	await ctx.send(
	"Please specify what application you want to use.\n"
	"Available applications:\n"
	"`youtube`, `poker`, `betrayal`, `fishing`, `chess`"
	)

Try this instead:

app_list = ""
for app in DiscordTogether.default_choices:
    app_list += f"`{app}`, "
await ctx.send( 
             "Please specify what application you want to use.\n" 
             "Available applications:\n" 
             app_list 
         )