docs: add ADLS backend docs

docs/integrations/object-storage/adls.md

@@ -0,0 +1,57 @@
+# Azure ADLS Storage Backend
+
+`delta-rs` offers native support for using Microsoft Azure Data Lake Storage (ADSL) as an object storage backend.
+
+You don’t need to install any extra dependencies to read/write Delta tables to S3 with engines that use `delta-rs`. You do need to configure your ADLS access credentials correctly.
+
+## Passing Credentials Explicitly
+
+You can also pass ADLS credentials to your query engine explicitly.
+
+For Polars, you would do this using the `storage_options` keyword as demonstrated above. This will forward your credentials to the `object store` library that Polars uses for cloud storage access under the hood. Read the [`object store` documentation](https://docs.rs/object_store/latest/object_store/azure/enum.AzureConfigKey.html#variants) for more information defining specific credentials.
+
+## Example: Write Delta table to ADLS with Polars
+
+Using Polars, you can write a Delta table to ADLS directly like this:
+
+```python
+import polars as pl
+
+df = pl.DataFrame({"foo": [1, 2, 3, 4, 5]})
+
+# define container name
+container = <container_name>
+
+# define credentials
+storage_options = {
+    "ACCOUNT_NAME": <account_name>,
+    "ACCESS_KEY": <access_key>,
+}
+
+# write Delta to ADLS
+df_pl.write_delta(
+    f"abfs://{container}/delta_table",
+    storage_options = storage_options
+)
+```
+
+## Example with pandas
+
+For libraries without direct `write_delta` methods (like Pandas), you can use the `write_deltalake` function from the `deltalake` library:
+
+```python
+import pandas as pd
+from deltalake import write_deltalake
+
+df = pd.DataFrame({"foo": [1, 2, 3, 4, 5]})
+
+write_deltalake(
+    f"abfs://{container}/delta_table_pandas",
+    df,
+    storage_options=storage_options
+)
+```
+
+## Using Local Authentication
+
+If your local session is authenticated using the Azure CLI then you can write Delta tables directly to ADLS. Read more about this in the [Azure CLI documentation](https://learn.microsoft.com/en-us/cli/azure/).

mkdocs.yml

@@ -82,6 +82,7 @@ nav:
       - api/exceptions.md
   - Integrations:
       - Object Storage:
+          - integrations/object-storage/adls.md
           - integrations/object-storage/hdfs.md
           - integrations/object-storage/s3.md
           - integrations/object-storage/s3-like.md