feat: add iceberg with spark

Signed-off-by: kjuulh <contact@kjuulh.io>

templates/create_iceberg_sink.sql

@@ -0,0 +1,15 @@
+CREATE SINK clicks_iceberg_sink
+FROM
+    clicks WITH (
+    connector = 'iceberg',
+    type = 'upsert',
+    primary_key = 'user_id, ad_id, click_timestamp, impression_timestamp',
+    warehouse.path = 's3://hummock001/iceberg-data',
+    s3.endpoint = 'http://minio-0:9301',
+    s3.access.key = 'hummockadmin',
+    s3.secret.key = 'hummockadmin',
+    s3.region = 'us-east-1',
+    catalog.type = 'storage',
+    database.name='demo_db',
+    table.name='demo_table'
+);