为PAGImage添加了从file bytes和pixels bytes构造方法，以及width和height属性

fix: miss libavc in build libpag

Merge branch 'main' of github.com:welltop-cn/pypag into main

implemented APIs

Update README.md

Update README.md

add sample resource

fix: CMakefile

move built libs to /libs/linux/x64

add CMakeLists.txt

implement APIs used in https://github.com/Tencent/libpag/blob/main/linux/src/main.cpp

init commit