Add Section RGB examples

[aliphys]

This PR adds two examples, that selects the color of the RGB LED on the GIGA R1 WiFi based on the location touched on the screen.

• 🆓 Non-blocking delay with millis() used as a simple de-bouncing mechanism.
• 🚥 The LED onboard the GIGA R1 WiFi is used to display the feedback from the touch events. Using the RGB LED on the GIGA Display Shield itself would create a cyclical dependency since the GIGADisplayRGB class is part of arduino-libraries/Arduino_GigaDisplay
• 🌐 Interrupt Section_IRQ.ino and polling approaches Section_Polling.ino are covered.

Closes #10