Update API docs for data_files and delete_files

Author: soumya-ghosh

mkdocs/docs/api.md

@@ -845,6 +845,19 @@ readable_metrics: [
 [6.0989]]
 ```
 
+<!-- prettier-ignore-start -->
+
+!!! info
+    Content refers to type of content stored by the data file:
+
+    - 0  Data
+    - 1  Position Deletes
+    - 2  Equality Deletes
+
+<!-- prettier-ignore-end -->
+
+To show only data files or delete files in the current snapshot, use `table.inspect.data_files()` and `table.inspect.delete_files()` respectively.
+
 ## Add Files
 
 Expert Iceberg users may choose to commit existing parquet files to the Iceberg table as data files, without rewriting them.