Batch of dataframe commands (#442)

* corrected missing shellerror type

* batch dataframe commands

* removed option to find declaration with input

* ordered dataframe folders

crates/nu-engine/src/eval.rs

@@ -26,7 +26,7 @@ fn eval_call(
     call: &Call,
     input: PipelineData,
 ) -> Result<PipelineData, ShellError> {
-    let decl = engine_state.get_decl_with_input(call.decl_id, &input);
+    let decl = engine_state.get_decl(call.decl_id);
 
     if call.named.iter().any(|(flag, _)| flag.item == "help") {
         let full_help = get_full_help(&decl.signature(), &decl.examples(), engine_state);