doc: Add implementation status to README (#1152)

## What changes are included in this PR?
In the discussion
[here](#1140), I felt
it was necessary to let users know what was available in the rust
implementation of Iceberg.

This is under the assumption that this page is accurately updated after
every version release.

Author: jonathanc-n

README.md

@@ -74,6 +74,10 @@ The Apache Iceberg Rust project is composed of the following components:
 [iceberg-catalog-rest release docs]: https://docs.rs/iceberg-catalog-rest
 [iceberg-catalog-rest dev docs]: https://rust.iceberg.apache.org/api/iceberg_catalog_rest/
 
+## Iceberg Rust Implementation Status
+
+The features that Iceberg Rust currently supports can be found [here](https://iceberg.apache.org/status/).
+
 ## Supported Rust Version
 
 Iceberg Rust is built and tested with stable rust, and will keep a rolling MSRV(minimum supported rust version).