Add readme

tests/data/iceberg/default.db/iceberg_table_2/README.md

@@ -0,0 +1,32 @@
+This table was generated with the following code:
+
+```python
+import pyarrow as pa
+from pyiceberg.catalog import load_catalog
+from pyiceberg.schema import Schema
+from pyiceberg.types import NestedField, IntegerType, StringType
+catalog = load_catalog(
+    "s3",
+    **{
+        "type": "sql",
+        "uri": "sqlite:///tests/data/iceberg/iceberg_catalog.db",
+        "s3.endpoint": "http://localhost:9000",
+        "s3.access-key-id": "minioadmin",
+        "s3.secret-access-key": "minioadmin",
+        "warehouse": "s3://seafowl-test-bucket/test-data/iceberg",
+    },
+)
+schema = Schema(
+    NestedField(field_id=1, name='key', field_type=IntegerType(), required=False),
+    NestedField(field_id=2, name='value', field_type=StringType(), required=False),
+)
+catalog.create_namespace_if_not_exists('default')
+iceberg_table = catalog.create_table_if_not_exists(identifier='default.iceberg_table_2', schema=schema)
+pa_table_data = pa.Table.from_pylist([
+    {'key': 1, 'value': 'one'},
+    {'key': 2, 'value': 'two'},
+    {'key': 3, 'value': 'three'},
+    {'key': 4, 'value': 'four'},
+], schema=iceberg_table.schema().as_arrow())
+iceberg_table.append(df=pa_table_data)
+```