Update Readme for "Installation and Configuration Plattform IO" example ESP32

[raindancer2204]

Hello, this is a really great project. I read the readme and it's really well done.
The only thing missing is for the "normal non-programmers" how can they compile the software with VS Code.

Could sombody pelase update the readme to make it a little better.
If i forgot something, please update. Can someone include this in the readme?

### Install VS Code with Plugin "Platform IO" and Libarys.

1. Install MS Visuale Studio Code.
2. Install Plugin "Platform IO" into VS Code.
3. Download the Project from Github, and open it in your PlatformIO (it will automaticly load dependencies C++ etc)
4. Add your ESP32 via USB to the PC.
5. Check in Plugin Platform IO TAB --> Devices that your ESP is connectet via COM PORT
6. Make a PlatformIO: Clean (Icons in the right bottom corner with a recycle bin)
7. Add the secrets.h to the include directory and modify Passwords and save it
8. Start the Platform:IO Build with the Icoon is also located in the right bottom corner.
9. Read Logfile here are comming hints what libarys are needed.
10. Go in PlatformIO to the "Icon Libarys" and install the needed libarys.
11. Try it again, Clean, Build, check logfile and add Libarys if needed.
12. If all works fine the System will Build the Image.
13. After this you can start the upload to the ESP32 via "PlatfromIO Upload" in the right bottom corner.

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Test the Build on the ESP:
After the succesfully upload to ESP32 you can test it via your Mobile Phone.
Unplug and Connect USB Power to the ESP and Check if you see the WLAN "Ikea Display Setup WiFi".
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