Convert open/fetch to stream (#2028)

* Types lined up for open with stream

* Chunking stream

* Maybe I didn't need most of the Stream stuff after all?

* Some clean-up

* Merge weird cargo.lock

* Start moving some encoding logic to MaybeTextCodec

Will we lose the nice table formatting if we Stream? How do we get it back? Collect the Stream at the end?

* Clean-up and small refinements

* Put in auto-convert workaround

* Workaround to make sure bat functionality works

* Handle some easy error cases

* All tests pass

* Remove guessing logic

* Address clippy comments

* Pull latest master and fix MaybeTextCodec usage

* Add tag to enable autoview

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

@@ -224,7 +224,11 @@ fn errors_if_file_not_found() {
         cwd: "tests/fixtures/formats",
         "open i_dont_exist.txt"
     );
-
-    //assert!(actual.err.contains("File could not be opened"));
-    assert!(actual.err.contains("Cannot open"));
+    let expected = "Cannot canonicalize";
+    assert!(
+        actual.err.contains(expected),
+        "Error:\n{}\ndoes not contain{}",
+        actual.err,
+        expected
+    );
 }