Add per point alignment for incremental UMAP
Improve incremental UMAP by aligning each point of a new UMAP mapper with the shared points of the previous mapper individually. This replaces the current alignment method that aligns all points at once.
Improve incremental UMAP by aligning each point of a new UMAP mapper with the shared points of the previous mapper individually. This replaces the current alignment method that aligns all points at once.