Upgrade TypeSpec to 1.0.0-rc.0 (#5097)

Co-authored-by: Pan Shao <pashao@microsoft.com>

Author: pshao25

common/changes/@autorest/openapi-to-typespec/upgradeRC0_2025-04-10-09-56.json

@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@autorest/openapi-to-typespec",
+      "comment": "Upgrade TypeSpec to 1.0.0-rc.0",
+      "type": "minor"
+    }
+  ],
+  "packageName": "@autorest/openapi-to-typespec"
+}