Added llama-2-7b-hf lens trained on redpj sample

lens/meta-llama/Llama-2-7b-hf/config.json

@@ -0,0 +1 @@
+{"base_model_name_or_path": "meta-llama/Llama-2-7b-hf", "d_model": 4096, "num_hidden_layers": 32, "bias": true, "base_model_revision": null, "unembed_hash": "3313b62209f366e7b19233ae7068501553350611c20f96caf2499c0486f8836b", "lens_type": "linear_tuned_lens"}

lens/meta-llama/Llama-2-7b-hf/params.pt

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:bc13d3a19107877e868019505dbc6428d594c573edcac2c28d1017dd521f8fb3
+size 2148023459