Adds drop number of rows command (#1663)

* Fix access to columns with quoted names

* Add a drop number of rows from end of table

crates/nu-cli/tests/commands/drop.rs

@@ -0,0 +1,11 @@
+use nu_test_support::nu;
+
+#[test]
+fn drop_rows() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats",
+        r#"echo '[{"foo": 3}, {"foo": 8}, {"foo": 4}]' | from-json | drop 2 | get foo | sum | echo $it"#
+    );
+
+    assert_eq!(actual, "3");
+}

crates/nu-cli/tests/commands/mod.rs

@@ -5,6 +5,7 @@ mod cd;
 mod compact;
 mod cp;
 mod default;
+mod drop;
 mod each;
 mod edit;
 mod enter;