Add method to support convert image to pixelASCII matrix
Refactor the code to match the oop mode for easy mock and test
add the fit options to scale the image to fit the screen
Fxied the fetched wrong image width and height issue
Add some convert to fixed the lint issue
refactor the convert package
Fixed a slice allocate issue
add colored the asicc output
Add the method to fit the screen
add new method to convert a image from filename directly
add convert package to convert a image to ascii matrix