docs: add list of tests to README

Author: urish

README.md

@@ -1,4 +1,22 @@
 # Wokwi Part Tests
 
-This repository contains a set of test projects for many Wokwi parts. The tests can be compiled 
+This repository contains a set of test projects for many Wokwi parts. The tests can be compiled
 using platformio and then run using the Wokwi CLI.
+
+## List of Tests
+
+- board-ssd1306
+  - [ESP32](./board-ssd1306/oled-esp32/)
+- wokwi-dht22
+  - [Arduino Uno](./wokwi-dht22/dht22-uno/)
+  - [ESP32](./wokwi-dht22/dht22-esp32/)
+  - [Raspberry Pi Pico](./wokwi-dht22/dht22-pico/)
+  - [STM32L0](./wokwi-dht22/dht22-stm32/)
+- wokwi-ili9341
+  - [Arduino Uno](./wokwi-ili9341/lcd-uno/)
+- wokwi-micro-sd
+  - [ESP32](./wokwi-micro-sd/sd-esp32/)
+- wokwi-slide-potentiometer
+  - [Arduino Uno](./wokwi-slide-potentiometer/pot-uno/)
+  - [ESP32](./wokwi-slide-potentiometer/pot-esp32/)
+