(docs):Add CLIP image embedding example (#660)

In this PR, I add a guide that lets you use Roboflow Inference to
calculate CLIP embeddings for use in LanceDB. This post was reviewed by
@AyushExel.

docs/mkdocs.yml

@@ -80,6 +80,7 @@ nav:
     - Ingest Embedding Functions: embeddings/embedding_functions.md
     - Available Functions: embeddings/default_embedding_functions.md
     - Create Custom Embedding Functions: embeddings/api.md
+    - Example - Calculate CLIP Embeddings with Roboflow Inference: examples/image_embeddings_roboflow.md
     - Example - Multi-lingual semantic search: notebooks/multi_lingual_example.ipynb
     - Example - MultiModal CLIP Embeddings: notebooks/DisappearingEmbeddingFunction.ipynb
   - 🔍 Python full-text search: fts.md