feat(events): add message update, role, and voice state update handlers

- Implemented `handle_message_update` to log message edits.
- Created role event handlers for role creation, update, and deletion.
- Added voice state update handling to log channel changes.
- Introduced a new `ready_event` handler to restore bot presence and enforce blacklist.
- Updated `mod.rs` to include new event modules.
- Enhanced `main.rs` for database connection and initialization.
- Added comprehensive permission management in `permissions.rs`.

src/commands/clear_messages.rs

@@ -0,0 +1,27 @@
+use serenity::model::prelude::*;
+use serenity::prelude::*;
+
+use crate::commands::moderation_tools;
+
+pub async fn handle_clear_messages(ctx: &Context, msg: &Message, args: &[&str]) {
+    moderation_tools::handle_clear_messages(ctx, msg, args).await;
+}
+
+pub struct ClearMessagesCommand;
+pub static COMMAND_DESCRIPTOR: ClearMessagesCommand = ClearMessagesCommand;
+
+impl crate::commands::command_contract::CommandSpec for ClearMessagesCommand {
+    fn metadata(&self) -> crate::commands::command_contract::CommandMetadata {
+        crate::commands::command_contract::CommandMetadata {
+            key: "clear_messages",
+            command: "clear",
+            category: "admin",
+            params: "<nombre> [@membre/ID]",
+            summary: "Supprime des messages dans le salon",
+            description: "Supprime un nombre de messages, optionnellement filtres par membre.",
+            examples: &["+clear 20", "+clear 20 @User"],
+            alias_source_key: "clear_messages",
+            default_aliases: &["purge"],
+        }
+    }
+}