Fix path type using PWD from the environment (#12975)

This PR fixes the `path type` command so that it resolves relative paths
using PWD from the engine state.

As a bonus, it also fixes the issue of `path type` returning an empty
string instead of an error when it fails.

crates/nu-command/tests/commands/path/type_.rs

@@ -74,3 +74,14 @@ fn returns_type_of_existing_file_const() {
         assert_eq!(actual.out, "dir");
     })
 }
+
+#[test]
+fn respects_cwd() {
+    Playground::setup("path_type_respects_cwd", |dirs, sandbox| {
+        sandbox.within("foo").with_files(&[EmptyFile("bar.txt")]);
+
+        let actual = nu!(cwd: dirs.test(), "cd foo; 'bar.txt' | path type");
+
+        assert_eq!(actual.out, "file");
+    })
+}