Update README

README.md

@@ -1 +1,15 @@
-# community-extensions
+# DuckDB Community Extensions Repository
+
+The DuckDB Community Extensions Repository serves third-party extensions for DuckDB.
+Check the [announcement blog post](https://duckdb.org/2024/07/05/community-extensions).
+
+See the documentation for the current extensions:
+
+| Name | Description |
+|----|------------|
+| [crypto](https://community-extensions.duckdb.org/extensions/crypto.html) | Adds cryptographic hash functions and [HMAC](https://en.wikipedia.org/wiki/HMAC). |
+| [h3](https://community-extensions.duckdb.org/extensions/h3.html) | Implements hierarchical hexagonal indexing for geospatial data. |
+| [lindel](https://community-extensions.duckdb.org/extensions/lindel.html) | Implements linearization/delinearization, Z-Order, Hilbert and Morton curves. |
+| [prql](https://community-extensions.duckdb.org/extensions/prql.html) | Allows running [PRQL](https://prql-lang.org/) commands directly within DuckDB. |
+| [scrooge](https://community-extensions.duckdb.org/extensions/scrooge.html) | Supports a set of aggregation functions and data scanners for financial data. |
+| [shellfs](https://community-extensions.duckdb.org/extensions/shellfs.html) | Allows shell commands to be used for input and output. |