Add talks and esp32c3-no-std-async-mqtt-demo project (#24)

* feat: Add esp32c3-no-std-async-mqtt-demo project

* feat: Add talks

* Add DevConf 2022 talk

Co-authored-by: Juraj Sadel <jurajsadel@gmail.com>

---------

Co-authored-by: Juraj Sadel <jurajsadel@gmail.com>

README.md

@@ -10,7 +10,7 @@
 
 - [Community](#community)
 - [Books, Blogs, and Training Materials](#books-blogs-and-training-materials)
-- [Video Courses](#video-courses)
+- [Video Courses and Talks](#video-courses-and-talks)
 - [Tools](#tools)
 - [Templates](#templates)
 - [Open Hardware](#open-hardware)
@@ -41,11 +41,14 @@ You can usually find community members (including some employees of Espressif) i
   - [その 1 環境構築](https://lang-ship.com/blog/work/esp32-std-rust-1/) (Part 1: Building the environment)
   - [その 2 L チカ](https://lang-ship.com/blog/work/esp32-std-rust-2/) (Part 2: Blink an LED)
 
-## Video Courses
+## Video Courses and Talks
 
 - [EN] [Rust on ESP32-C3](https://www.youtube.com/playlist?list=PLkch9g9DEE0Lkm1LqcD7pZNDmXEczOo-a)
 - [EN] [Andrei Litvin / @embedded-rust](https://www.youtube.com/@embedded-rust/videos)
+- [EN] [Rust embedded at Espressif @ Copenhagen Rust Community](https://www.youtube.com/watch?v=gdmUhzJfgzk)
+- [EN] [Embedded Rust on ESP32 - Juraj Michálek - Rust Linz November 2022](https://www.youtube.com/watch?v=0PPPdqoDBQs)
 
+[EN] [Rust on Espressif chips - Scott Mabin](https://www.youtube.com/watch?v=qeEmJ_-6fPg)
 ## Tools
 
 - [espup](https://github.com/esp-rs/espup) - Tool for installing and maintaining the required toolchains for developing applications in Rust for Espressif SoC's.
@@ -91,6 +94,7 @@ You can usually find community members (including some employees of Espressif) i
 - [esp32s3-box-examples](https://github.com/sambenko/esp32s3-box-examples) - Various graphic examples for ESP32-S3 Box.
 - [nostd-wifi-lamp](https://github.com/Nereuxofficial/nostd-wifi-lamp) - A Wi-Fi Lamp built with an ESP32 and Neopixel Lights controllable via Wi-Fi
 - [plantineers-edge](https://github.com/plantineers/edge) - Firmware for edge devices for an Open Source Plant Monitoring solution using esp-now
+- [esp32c3-no-std-async-mqtt-demo](https://github.com/JurajSadel/esp32c3-no-std-async-mqtt-demo) - ESP32-C3 application that measures temperature (using BMP180) and sends the results with MQTT via WiFi - everything is done asynchronously. Also available for [ESP32](https://github.com/JurajSadel/esp32-no-std-async-mqtt-demo) and [ESP32-S3](https://github.com/JurajSadel/esp32s3-no-std-async-mqtt-demo)
 
 ## License