Revise README for clarity and added demo application info

Updated README to clarify library description and usage.

Author: tom-code

readme.md

@@ -3,12 +3,14 @@
 ![build](https://github.com/tom-code/rust-matc/actions/workflows/rust.yml/badge.svg)
 [![doc](https://github.com/tom-code/rust-matc/actions/workflows/doc.yml/badge.svg)](https://tom-code.github.io/rust-matc/matc/)
 
-This is prototype of matter protocol library in rust (controller side).
+This is matter protocol library in rust (controller side).
 
 [API doc](https://tom-code.github.io/rust-matc/matc/)
 
 [Examples](https://github.com/tom-code/rust-matc/tree/main/examples)
 
+[Matter controller desktop application also demonstrates use of this library](https://github.com/tom-code/matc-ui)
+
 It supports controller side of:
 
 * PASE - passcode authenticated session establishment
@@ -19,8 +21,9 @@ It supports controller side of:
   * sign and push certificates to device
   * BLE commissioning with Wi-Fi/Thread credential provisioning (opt-in, `--features ble`)
 * Basic interactions
-  * Read attribute
-  * Invoke command
+  * Read/Write attributes
+  * Invoke commands
+  * Subscribe for notifications
 
 ### BLE commissioning
 
@@ -37,7 +40,9 @@ cargo run --features ble --example simple-ble -- \
   --pairing-code "MT:Y.K908..." --ssid HomeWifi --password secret --node-id 300 --name "kitchen light"
 ```
 
-Use of demo application:
+### Use of demo application:
+note: this is original low level demo application. It is probably better to follow devman_demo for higher level api. See https://github.com/tom-code/rust-matc/tree/main/examples
+
 * Compile demo application using cargo. Binary will be found usually in target/debug/examples/demo.\
   `cargo build --example demo`
 * demo application uses clap. use --help to learn all supported parameters
@@ -73,4 +78,4 @@ Other demo application flags:
 * --local-address - specify local bind address for matter protocol. Format is ip:port. This is
   ip/port which is used as source address for matter UDP requests.
   Default is 0.0.0.0:5555. When IPV6 is used this must be changed for example to --local-address "[\:\:]:5555"
-* --cert-path - change directory where pem files with keys and certificates are stored
+* --cert-path - change directory where pem files with keys and certificates are stored