Try to enable all webidls (#573)

* Try to enable all webidls

* Separate out unavailable webidl files by reason.

* Create record of fully tested WebIDL files

* Update notes to reflect new situation with web-idl

* Make a blank ident fail, disable the necessary widls.

It turns out that all the blank idents came from blank enum variants,
which is allowed in webidl apparently.

crates/web-sys/webidls/enabled/TextClause.webidl

@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[ChromeOnly]
+interface TextClause
+{
+  // The start offset of TextClause
+  readonly attribute long startOffset;
+
+  // The end offset of TextClause
+  readonly attribute long endOffset;
+
+  // If the TextClause is Caret or not
+  readonly attribute boolean isCaret;
+
+  // If the TextClause is TargetClause or not
+  readonly attribute boolean isTargetClause;
+};