feat(rooms): Add room rent tips.

src/modules/rooms/cog.py

@@ -523,12 +523,31 @@ class RoomCog(LionCog):
             self._start(room)
 
             # Send tips message
-            # TODO: Actual tips.
-            await room.channel.send(
-                    "{mention} welcome to your private room! You may use the menu below to configure it.".format(
-                    mention=ctx.author.mention
-                )
+            tips = (
+                "Welcome to your very own private room {owner}!\n"
+                "You may use the control panel below to quickly configure your room, including:\n"
+                "- Inviting (and removing) members,\n"
+                "- Depositing LionCoins into the room bank to pay the daily rent, and\n"
+                "- Adding your very own Pomodoro timer to the room.\n\n"
+                "You also have elevated Discord permissions over the room itself!\n"
+                "This includes managing messages, and changing the name, region,"
+                " and bitrate of the channel, or even deleting the room entirely!"
+                " (Beware you will not be refunded in this case.)\n\n"
+                "Finally, you now have access to some new commands:\n"
+                "{status_cmd}: This brings up the room control panel again,"
+                " in case the interface below times out or is deleted/hidden.\n"
+                "{deposit_cmd}:  Room members may use this command to easily contribute LionCoins to the room bank.\n"
+                "{invite_cmd} and {kick_cmd}: Quickly invite (or remove) multiple members by mentioning them.\n"
+                "{transfer_cmd}: Transfer the room to another owner, keeping the balance (this is not reversible!)"
+            ).format(
+                owner=ctx.author.mention,
+                status_cmd=self.bot.core.mention_cmd('room status'),
+                deposit_cmd=self.bot.core.mention_cmd('room deposit'),
+                invite_cmd=self.bot.core.mention_cmd('room invite'),
+                kick_cmd=self.bot.core.mention_cmd('room kick'),
+                transfer_cmd=self.bot.core.mention_cmd('room transfer'),
             )
+            await room.channel.send(tips)
 
             # Send config UI
             ui = RoomUI(self.bot, room, callerid=ctx.author.id, timeout=None)