Int: Add bitwise functions from Pervasives

[fhammerschmidt]

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[fhammerschmidt]

@cometkim fyi

[cometkim]

BigInt needs this too

[fhammerschmidt]

BigInt has a lot of missing docs so I will do that in a separate PR.

We also have the chance here to rename the functions into more descriptive ones, if we want.

lsl => logicalShiftLeft
lsl => logicalShiftRght
lxor => logicalXor
etc.

if we later on have operators for those functions anyway it would not matter as much if the names are longer.

[cometkim]

We also have the chance here to rename the functions into more descriptive ones, if we want.

We can "add", not rename

Even we support infix ops, the shorter names are still useful for those who prefer the pipe style.

[fhammerschmidt]

@zth As mentioned in discord, I just keep it as it is. Merge?

[zth]

Got for it!

[zth]

Got for it!

[fhammerschmidt]

I have no power here. If you moved Core over to the rescript org, I could do it.

[fhammerschmidt]

wait, I need to put them in their own submodule first