Simple paint

Works on Windows and Linux

Requirements:

• Qt 6.6.0
• cmake 3.14

Windows:

• On Windows add QTDIR system variable with the value C:\QtDir\QtVersion\msvc2019_64.
• Then add these paths to the Path system variable: %QTDIR%\lib and %QTDIR%\bin

Build:

mkdir build
cmake -S . -Bbuild
cmake --build build --config Release