feat: weighted geometric sums at a primitive root of unity

[naype888-cloud]

how this comit works, this PR only calculate two numerical sumatorial on the circle, by exact definition.
this commit doesn't have any physisc, it's an algebraic tooll to make all the chain compile Ok.

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[jstoobysmith]

I've closed these PRs, currently it seems like they do not fit in with our current direction.

[naype888-cloud]

I've closed these PRs, currently it seems like they do not fit in with our current direction.

im trying alot, im looking now for a cleanest derivatión of the theorem, i know it's looking like a weyrd and complex derivation, ,and you rigth it's a hard one...im keep trying pushing better PR with not alot code lines, i keep it short and clear. tks any way.