Add ReducerEvent to Reducer callbacks to match C# SDK and provide err…

…or message (#94)

Co-authored-by: Derek Brinkmann <dbrinkmann@citadelstudios.net>

crates/cli/src/subcommands/generate/typescript.rs

@@ -1156,7 +1156,7 @@ pub fn autogen_typescript_reducer(ctx: &GenCtx, reducer: &ReducerDef) -> String
     writeln!(output).unwrap();
 
     writeln!(output, "// @ts-ignore").unwrap();
-    writeln!(output, "import {{ __SPACETIMEDB__, AlgebraicType, ProductType, BuiltinType, ProductTypeElement, IDatabaseTable, AlgebraicValue, ReducerArgsAdapter, SumTypeVariant, Serializer }} from \"@clockworklabs/spacetimedb-sdk\";").unwrap();
+    writeln!(output, "import {{ __SPACETIMEDB__, AlgebraicType, ProductType, BuiltinType, ProductTypeElement, IDatabaseTable, AlgebraicValue, ReducerArgsAdapter, SumTypeVariant, Serializer, Identity, ReducerEvent }} from \"@clockworklabs/spacetimedb-sdk\";").unwrap();
 
     let mut imports = Vec::new();
     generate_imports(
@@ -1275,7 +1275,7 @@ pub fn autogen_typescript_reducer(ctx: &GenCtx, reducer: &ReducerDef) -> String
         // OnCreatePlayerEvent(dbEvent.Status, Identity.From(dbEvent.CallerIdentity.ToByteArray()), args[0].ToObject<string>());
         writeln!(
             output,
-            "public static on(callback: (status: string, identity: Uint8Array, reducerArgs: any[]) => void)"
+            "public static on(callback: (reducerEvent: ReducerEvent, reducerArgs: any[]) => void)"
         )
         .unwrap();
         writeln!(output, "{{").unwrap();