Add support for decimal floats

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Is your feature request related to a problem? Please describe.
I'm always frustrated when the compiler lies to me and instead of the number literal I see stores a different number to the memory/register and first then starts the actual computation.

Describe the solution you'd like
Either error out, that the given float literal can't be converted to a binary float due to loss of precision. Or add support for (arbitrary precision like mpdecimal?) decimal floats.

Describe alternatives you've considered
Leave it as it is - which is very painful and significantly contributes to the oddity of floats in general.

Additional context
N/A