fix Qt 6.4 build and few other changes

- include QStringEncoder and QStringDecoder for Qt 6.4
- update integrated qtbase_de.qm from Qt 6.3
- fix macOS theme detection on Qt 6
- bump copyright year and some version numbers
- remove ZEC donation
- rework README.md

README.md

@@ -14,36 +14,32 @@ Open Source Snapmatic and Savegame viewer/editor for GTA V
 #### Build gta5view for Windows
 
     # Note: Install Docker Community Edition and Git before continuing
-    git clone https://gitlab.com/Syping/gta5view && cd gta5view
     docker pull sypingauto/gta5view-build:1.10-static
-    docker run --rm -v "$PWD:/gta5view" -it sypingauto/gta5view-build:1.10-static
-    cd /gta5view && mkdir -p build && cd build
-    mingw64-qt-cmake ../
-    make -j $(nproc --all)
+    git clone https://gitlab.com/Syping/gta5view
+    docker run --rm -v "$PWD/gta5view:/gta5view" -it sypingauto/gta5view-build:1.10-static
+    mingw64-qt-cmake -B /gta5view/build /gta5view
+    cmake --build /gta5view/build
 
 #### Build gta5view for Debian/Ubuntu
 
     sudo apt-get install cmake git gcc g++ libqt5svg5-dev make qtbase5-dev qttranslations5-l10n
-    git clone https://gitlab.com/Syping/gta5view && cd gta5view
-    mkdir -p build && cd build
-    cmake ../
-    make -j $(nproc --all)
-    sudo make install
+    git clone https://gitlab.com/Syping/gta5view
+    cmake -B gta5view-build gta5view
+    cmake --build gta5view-build
+    sudo cmake --install gta5view-build
 
 #### Build gta5view for Arch/Manjaro
 
     sudo pacman -S cmake gcc git make qt5-base qt5-svg qt5-tools qt5-translations
-    git clone https://gitlab.com/Syping/gta5view && cd gta5view
-    mkdir -p build && cd build
-    cmake ../
-    make -j $(nproc --all)
-    sudo make install
+    git clone https://gitlab.com/Syping/gta5view
+    cmake -B gta5view-build gta5view
+    cmake --build gta5view-build
+    sudo cmake --install gta5view-build
 
-#### Build gta5view for Fedora
+#### Build gta5view for Fedora/RHEL
 
     sudo dnf install cmake git gcc gcc-c++ make qt5-qtbase-devel qt5-qtsvg-devel qt5-qttranslations
-    git clone https://gitlab.com/Syping/gta5view && cd gta5view
-    mkdir -p build && cd build
-    cmake ../
-    make -j $(nproc --all)
-    sudo make install
+    git clone https://gitlab.com/Syping/gta5view
+    cmake -B gta5view-build gta5view
+    cmake --build gta5view-build
+    sudo cmake --install gta5view-build