Add a parameter to index_dense_gt::make() function

[orchistro]

Fixes #656

Usage

using namespace unum::usearch;

auto cfg = index_dense_config_t{};
cfg.enable_key_lookups = false;

auto idx = index_dense_gt<uint64_t, uint32_t>::make({}, cfg, false); // <- here!
auto res = idx.view({buffer, buffer_size});

idx.change_metric(metric_punned_t{dimension,
                                  metric_kind_t::cos_k,
                                  scalar_kind_t::f32_k});
idx.change_expansion_search(ef_search);

auto search_res = idx.search(query, wanted_cnt);

[ashvardanian]

Thank you, @orchistro! I've merged it into the working draft of v3 🤗