Add README.md to datafusion-flight-sql-server directory

release-plz throw an error because it couldn't find the previous README.md

Author: hozan23

datafusion-flight-sql-server/Cargo.toml

@@ -3,9 +3,9 @@ name = "datafusion-flight-sql-server"
 version.workspace = true
 edition.workspace = true
 license.workspace = true
-readme.workspace = true
 repository.workspace = true
 description = "Datafusion flight sql server."
+readme = "README.md" 
 
 [lib]
 name = "datafusion_flight_sql_server"

datafusion-flight-sql-server/README.md

@@ -0,0 +1,53 @@
+# DataFusion Flight SQL Server
+
+The `datafusion-flight-sql-server` is a Flight SQL server that implements the
+necessary endpoints to use DataFusion as the query engine.
+
+## Getting Started
+
+To use `datafusion-flight-sql-server` in your Rust project, run:
+
+```sh
+$ cargo add datafusion-flight-sql-server
+```
+
+## Example
+
+Here's a basic example of setting up a Flight SQL server:
+
+```rust
+use datafusion_flight_sql_server::service::FlightSqlService;
+use datafusion::{
+    execution::{
+        context::SessionContext,
+        options::CsvReadOptions,
+    },
+};
+
+async {
+    let dsn: String = "0.0.0.0:50051".to_string();
+    let remote_ctx = SessionContext::new();
+    remote_ctx
+        .register_csv("test", "./examples/test.csv", CsvReadOptions::new())
+        .await.expect("Register csv");
+
+    FlightSqlService::new(remote_ctx.state()).serve(dsn.clone())
+        .await
+        .expect("Run flight sql service");
+
+};
+```
+
+This example sets up a Flight SQL server listening on `127.0.0.1:50051`.
+
+
+## Docs
+
+[Docs link](https://datafusion-contrib.github.io/datafusion-flight-sql-server/datafusion_flight_sql_server/).
+
+
+## Acknowledgments
+
+This repository was a Rust crate that was first built as a part of
+[datafusion-federation](https://github.com/datafusion-contrib/datafusion-federation/)
+repository.