Improved Encoding Detection

[thttg]

More nuanced logic that considers additional scenarios and combinations of encoding detections.

[AmyrAhmady]

For all of these three:

chardetng_encoding
chardet_encoding
charset_normalizer_encoding

they're only used in their lowercase version. so make them lowercase at the very top when you are applied detection to these variables, instead of calling to_lowercase() all the time, to make code execution faster and readable

[thttg]

For all of these three:

chardetng_encoding
chardet_encoding
charset_normalizer_encoding

they're only used in their lowercase version. so make them lowercase at the very top when you are applied detection to these variables, instead of calling to_lowercase() all the time, to make code execution faster and readable

Fixed.