v0.2.0

build with msvc2022, qt6.8.1, ffmpeg N-118247-g19c95ecbff-20250106(BtbN build)

changelog:
Fix save problem on non-utf8 environment.
Cache loaded video's info,skip decode when load again.
known issue:
Load long video will not show plot,save button work,will fix in future.
Notice: change "large: false" to "large: true" in resource/template.html will improve rendering efficiency(suggest for long video),but lose different colors for i,b,p frames.