[Feature] Add a current eidolon/superimposition option to warp planner

[fribbels]

Motivation

Currently the warp planner assumes the user does not have the character or light cone yet. Sometimes you could be pulling on a rerun and already have some eidolons/superimpositions

Goal

Update the UI to have a "Current eidolon" and "Current superimposition" option:

Starting point: https://github.com/fribbels/hsr-optimizer/blob/main/src/lib/tabs/tabWarp/warpCalculatorController.ts#L22

This should then reflect in the milestone generation and the results grid, e.g. don't show E0S0 if the user already has E0S0. The math shouldn't have to change

Starting point: https://github.com/fribbels/hsr-optimizer/blob/main/src/lib/tabs/tabWarp/WarpCalculatorTab.tsx#L299