Docs/issue 1661 add tip to source docs and update weaviate docs

docs/website/docs/dlt-ecosystem/destinations/weaviate.md

@@ -116,6 +116,22 @@ weaviate_adapter(
     tokenization={"title": "word", "description": "whitespace"},
 )
 ```
+When adapting resources, it's important to implement changes directly to the data source itself rather than extracting resources separately. Here's how:
+
+```py
+products_tables = sql_database().with_resources("products", "customers")
+
+pipeline = dlt.pipeline(
+        pipeline_name="postgres_to_weaviate_pipeline",
+        destination="weaviate",
+    )
+
+# adapt the resource within the source
+weaviate_adapter(products_tables.products, vectorize="description")
+weaviate_adapter(products_tables.customers, vectorize="bio")
+
+info = pipeline.run(products_tables)
+```    
 
 :::tip
 

docs/website/docs/general-usage/source.md

@@ -187,6 +187,12 @@ Several data sources are prone to contain semi-structured documents with very de
 MongoDB databases. Our practical experience is that setting the `max_nesting_level` to 2 or 3
 produces the clearest and human-readable schemas.
 
+:::tip TIP
+The `max_table_nesting` parameter at the source level doesn't automatically apply to individual 
+resources when accessed directly (e.g., using `source.resources["resource_1"])`. To make sure it 
+works, either use `source.with_resources("resource_1")` or set the parameter directly on the resource.
+:::
+
 ### Modify schema
 
 The schema is available via `schema` property of the source.