Added commands + persistence

+ `say`: used by the host to speak in the game chat
+ `end`: ends the game and cleans up
+ `broadcast`: Send an important game message that that is pinned in each channel
+ Persistent allows games to continue across bot restarts
+ clippy + fmt

.gitignore

@@ -1,3 +1,4 @@
 /target
 config.toml
+wOxlf_data.toml
 .idea