Proof of principle use of Reduced GCI for boosting the loaded VQE

[marekgluza]

• [x] please use load vqe for some data of Matteo and implement by hand the V_1 (and V_2?) from the screenshot. For this store the unitary for VQE and $e^{iD}$. Get the compiling of $e^{iH_0t}$ from @jeongrak-son and @khanhuyengiang

[marekgluza]

Essentially done, see #52