Change to context-input API

[KmolYuan]

The shared state Context type replace the old AlgorithmBase structure.

The Algorithm trait API can be changed to:

fn init(&mut self, ctx: &mut Context) {}
fn generation(&mut self, ctx: &mut Context);

And the Solver trait can be changed to a structure Solver<M, F>:

struct Solver<M, F>
where
    M: Algorithm,
    F: ObjFunc,
{
    method: M,
    func: F,
}

[KmolYuan]

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