docs: Add fork info to README

Author: DeflateAwning

README.md

@@ -17,3 +17,15 @@ parallel query processing.
 from the marketplace.
 
 2. Open a Parquet (.parquet, .pq) file or CSV (.csv) and the extension will activate.
+
+## Acknowlegements - Forked
+
+Flat File Explorer is a fork of the [AdamViola's Parquet Explorer](https://github.com/adamviola/parquet-explorer), which appears to be semi-abandoned. This fork includes many improvements, including:
+
+* Fast copying the query's source.
+* Automatically reload if file changes on disk.
+* Shows a hint to press Ctrl+Enter to query.
+* Support for CSV files (in addition to Parquet files).
+* Various bug fixes.
+* Full rewrite in TypeScript.
+* Actively maintained.