Merge CRISPR lookup and unknown characterization

Update CRISPR benchmark page

Benchmark tab: add Cas-only Pfam-verified reference section

Characterize: add ESM2-vs-Twin-MF signal-strength panel for unknowns

Characterize tab: pre-computed gallery of 24 uncharacterised proteins

Add Twin-MF embeddings + UMAP coords for Characterize tab (force past *.npy gitignore)

Benchmark: UMAP first, Twin-MF as primary, drop emojis, professional tone

Benchmark: replace ROC with silhouette; add URL-hash tab deep-linking

Extend Benchmark tab: UMAP, ROC, and BP-vs-CC-vs-MF aspect comparison

Add Benchmark tab: CRISPR clustering comparison ESM2 vs Twin-BP

Add crispr_reference/embeddings_esm2.npy (force past *.npy gitignore)

Add crispr_reference/embeddings.npy (force through *.npy gitignore)

Wire CRISPR reference (Twin-BP) into the Lookup tab