Clean up batch code (#2041)

* Clean up batch code

* A snapshot a day keeps the bugs away! 📷🐛 (OS: ubuntu)

* Remove 'flush_batch: bool' from send_modeling_cmd

It was always being set with false, and it was
bugged for true. If true was set, the cmd would
never actually be run.

* Fix derive-docs

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

src/wasm-lib/kcl/src/std/mod.rs

@@ -211,10 +211,7 @@ impl Args {
         id: uuid::Uuid,
         cmd: kittycad::types::ModelingCmd,
     ) -> Result<OkWebSocketResponseData, KclError> {
-        self.ctx
-            .engine
-            .send_modeling_cmd(false, id, self.source_range, cmd)
-            .await
+        self.ctx.engine.send_modeling_cmd(id, self.source_range, cmd).await
     }
 
     fn make_user_val_from_json(&self, j: serde_json::Value) -> Result<MemoryItem, KclError> {