Replace the Studio parser module with a pure Python implementation

PiperOrigin-RevId: 953181335
Change-Id: I1d2ce6f27f50aa4c30cce6d43caed80186ddef42

python/mujoco/experimental/studio/parser.py

@@ -0,0 +1,24 @@
+# Copyright 2026 DeepMind Technologies Limited
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Loads and compiles MuJoCo models for the studio viewer."""
+
+import mujoco
+
+
+def parse(filepath: str) -> mujoco.MjData:
+  if filepath.endswith('.mjb'):
+    model = mujoco.MjModel.from_binary_path(filepath)
+  else:
+    model = mujoco.MjSpec.from_file(filepath).compile()
+  return mujoco.MjData(model)