Add first_rclrs_node example and update documentation links

Author: roboticswithjulia

README.md

@@ -71,5 +71,5 @@ ros2 launch examples_rclrs_minimal_pub_sub minimal_pub_sub.launch.xml
 ```
 
 Further documentation articles:
-- [Tutorial on writing your first node with `rclrs`](docs/writing-your-first-rclrs-node.md)
+- [Tutorial on writing your first node with `rclrs`](./examples/minimal_pub_sub/src/first_rclrs_node.rs)
 - [Contributor's guide](docs/CONTRIBUTING.md)

docs/writing-your-first-rclrs-node.md

@@ -25,6 +25,11 @@ path = "src/zero_copy_subscriber.rs"
 name = "zero_copy_publisher"
 path = "src/zero_copy_publisher.rs"
 
+[[bin]]
+name = "first_rclrs_node"
+path = "src/first_rclrs_node.rs"
+
+
 [dependencies]
 anyhow = {version = "1", features = ["backtrace"]}