Deprecate creating a guild (#3348)

Author: jamesbt365

src/http/client.rs

@@ -661,6 +661,7 @@ impl Http {
     /// [documentation on this endpoint]:
     /// https://discord.com/developers/docs/resources/guild#create-guild
     /// [whitelist]: https://discord.com/developers/docs/resources/guild#create-guild
+    #[deprecated = "This endpoint has been deprecated by Discord and will stop functioning after July 15, 2025. For more information, see: https://discord.com/developers/docs/change-log#deprecating-guild-creation-by-apps"]
     pub async fn create_guild(&self, map: &Value) -> Result<PartialGuild> {
         self.fire(Request {
             body: Some(to_vec(map)?),

src/model/guild/mod.rs

@@ -665,6 +665,7 @@ impl Guild {
     ///
     /// [`Shard`]: crate::gateway::Shard
     /// [whitelist]: https://discord.com/developers/docs/resources/guild#create-guild
+    #[deprecated = "This endpoint has been deprecated by Discord and will stop functioning after July 15, 2025. For more information, see: https://discord.com/developers/docs/change-log#deprecating-guild-creation-by-apps"]
     pub async fn create(
         http: impl AsRef<Http>,
         name: &str,
@@ -675,6 +676,7 @@ impl Guild {
             "name": name,
         });
 
+        #[allow(deprecated)]
         http.as_ref().create_guild(&map).await
     }