chore: re-enable scheme hooks after engine speed fix

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

crates/openwa-wormkit/src/replacements/mod.rs

@@ -18,8 +18,7 @@ pub fn install_all() -> Result<(), String> {
     game_session::install()?;
     hardware_init::install()?;
     frontend::install()?;
-    // Temporarily disabled: loading custom scheme causes game to play super fast
-    // scheme::install()?;
+    scheme::install()?;
     config::install()?;
     weapon::install()?;
     team::install()?;