Enable protobuf edition 2023 support

This change backports our binary serialization/deserialization
code. The newer code includes several years worth of improvements that
improve the overall conformance findings. The improved state of things
allows us to enable protobuf edition 2023.

Other items:

- Add missing export annotation for BinaryReader.readStringRequireUtf8
- promote protobuf conformance testing client to main directory

Author: dibenede

.gitignore

@@ -1,4 +1,5 @@
 .idea
+.vscode
 node_modules
 commonjs_out
 google/protobuf
@@ -7,3 +8,6 @@ bazel-*
 /testproto_libs1.js
 /testproto_libs2.js
 /google-protobuf.js
+/google-protobuf-*.tgz
+/conformance/protos/*.js
+/conformance/package-lock.json

MODULE.bazel.lock

@@ -0,0 +1,14 @@
+goog.module('jspb.binary.any_field_type');
+
+const {RepeatedFieldType} = goog.require('jspb.binary.repeated_field_type');
+const {ScalarFieldType} = goog.requireType('jspb.binary.scalar_field_type');
+
+
+/**
+ * A field in jspb can be a scalar, a block of bytes, another proto, or an
+ * array of any of the above.
+ * @typedef {?ScalarFieldType|?RepeatedFieldType|!Uint8Array}
+ */
+let AnyFieldType;
+
+exports = {AnyFieldType};