feat: Implemented daily timer

- Bump version to 0.10.0
- Added /timer command

discord/src/error.rs

@@ -20,6 +20,7 @@ pub enum Error {
     RoomNotFound(u16),
     RoomAlreadyUnlocked(u16),
     CannotReach(u16),
+    TimerSet,
 }
 
 impl From<serenity::Error> for Error {
@@ -63,6 +64,7 @@ impl Display for Error {
             Self::RoomNotFound(id) => write!(f, "room #{id} not found"),
             Self::RoomAlreadyUnlocked(id) => write!(f, "room #{id} is already unlocked for this user"),
             Self::CannotReach(id) => write!(f, "user cannot reach room #{id}"),
+            Self::TimerSet => write!(f, "timer is already set"),
         }
     }
 }
@@ -81,7 +83,8 @@ impl std::error::Error for Error {
             Self::InsufficientFunds(_) |
             Self::RoomNotFound(_) |
             Self::RoomAlreadyUnlocked(_) |
-            Self::CannotReach(_) => None,
+            Self::CannotReach(_) |
+            Self::TimerSet => None,
             Self::SerenityError(error) => Some(error),
             Self::SquadQuestError(error) => Some(error),
         }