Add int -> hex and char -> hex inspection

[andig]

It's great that I can spy on hex values but sometimes I need to convert the other way round.

[Mortichar]

+1 For this feature request. I would love it if HexInspector worked on all numeric values. I realize it's called HexInspector, but I'm not really finding any other alternatives as far as extensions go.

[mateuszchudyk]

Support for decimal inputs has been added in v1.1.0. Regarding the character input, it is for consideration.