Add dataset conversion configuration

unitreerobotics_G1_Dex3_BlockStacking_Dataset.yaml

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+hf_source: "unitreerobotics/G1_Dex3_BlockStacking_Dataset"
+subset: null
+split: "train"
+revision: "main"
+target_name: "unitreerobotics_G1_Dex3_BlockStacking_Dataset"
+
+conversion:
+  mode: "script"
+  converter: "unitreerobotics_g1_dex3_blockstacking"
+  input_format: "parquet"
+  time_column: "timestamp"
+  time_precision: "ms"
+  tag_columns: ["episode_index", "task_index"]
+  rename: {}
+  drop: []
+  script_params:
+    source_dir: "D:\\code\\py\\unitreerobotics_G1_Dex3_BlockStacking_Dataset"
+    table_name: "unitreerobotics_g1_dex3_blockstacking"
+    fps: 30
+    time_source: "timestamp"
+    granularity: "merged"
+    tsfile_writer: "python"
+    stream_staging: false
+  encoding:
+    float: "GORILLA"
+    double: "GORILLA"
+    int32: "TS_2DIFF"
+    int64: "TS_2DIFF"
+    time: "TS_2DIFF"
+    boolean: "RLE"
+  compression:
+    default: "LZ4"
+    time: "LZ4"
+
+upload:
+  mode: "single"
+  repo_id: null
+
+attribution:
+  original_url: "https://huggingface.co/datasets/unitreerobotics/G1_Dex3_BlockStacking_Dataset"
+  license: "apache-2.0"
+  authors: "Unitree Robotics (dataset repository owner); source tree contributors Henry-Ellis and lv-1"
+  notes: |
+    The source is a 30 Hz LeRobot dataset with 301 episodes and 281,196 rows.
+    Time is round(timestamp * 1000) in milliseconds and restarts at zero per episode.
+    observation.state and action are flattened from 28-element float32 vectors.
+    Source videos are retained only at the original Hugging Face videos/ path.