[TOOL IMPROVEMENT] Integer base converter uppercase numeric support

[Csrayz]

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Describe the solution you'd like The hexadecimal uppercase number will not be recognized as an illegal number.

Additional context Sometimes numbers are copied from elsewhere, such as the hexadecimal number 0xA3B5, and the tool only seems to handle lowercase numbers. Currently when using the tool to convert base, you need to convert it to the lowercase number a3b5 first.

Besides, Is it possible to recognize the input number's base, e.g. 0x3A is recognized as hexadecimal and 0b101 is recognized as binary?

[sharevb]

Hi @Csrayz and @CorentinTh, fixed in #901