[SDY+ModelExplorer][1/4] Basic SDY support in model explorer. Register Shardy dialect in the mlir-to-json converter.

We will support SDY ops in the Model Explorer MLIR-JSON converter by
1) **(This CL)**  Registering the SDY Dialect
2) Adding hierarchical node information to SDY ops
3) Display sharding attributes on nodes / ops
4) Introducing specific logic for ops with nested regions

PiperOrigin-RevId: 744118602

Author: Varcho

shardy/dialect/sdy/ir/BUILD

@@ -147,6 +147,10 @@ cc_library(
         "utils.h",
         "verifiers.h",
     ],
+    visibility = [
+        "//shardy:friends",
+        "//third_party/tensorflow/compiler/mlir/lite/experimental/google/tooling:__pkg__",
+    ],
     deps = [
         ":attrs_inc",
         ":bytecode_inc",