feat: Added Ollama Integration

Author: tazarov

docs/integrations/ollama/ollama-embeddings.md

@@ -0,0 +1,84 @@
+# Ollama
+
+First let's run a local docker container with Ollama. We'll pull `nomic-embed-text` model:
+
+```bash
+docker run -d -v ./ollama:/root/.ollama -p 11434:11434 --name ollama ollama/ollama
+docker exec -it ollama ollama run nomic-embed-text # press Ctrl+D to exit after model downloads successfully
+# test it
+curl http://localhost:11434/api/embeddings -d '{"model": "nomic-embed-text","prompt": "Here is an article about llamas..."}'
+```
+
+!!! note "Ollama Docs"
+
+    For more information on Ollama, visit the [Ollama GitHub repository](https://github.com/ollama/ollama).
+
+Now let's configure our OllamaEmbeddingFunction Embedding (python) function with the default Ollama endpoint:
+
+```python
+import chromadb
+from chromadb.utils.embedding_functions import OllamaEmbeddingFunction
+
+client = chromadb.PersistentClient(path="ollama")
+
+# create EF with custom endpoint
+ef = OllamaEmbeddingFunction(
+    model_name="nomic-embed-text",
+    url="http://localhost:11434/api/embeddings",
+)
+
+print(ef(["Here is an article about llamas..."]))
+```
+
+For JS users, you can use the `OllamaEmbeddingFunction` class to create embeddings:
+
+```javascript
+const {OllamaEmbeddingFunction} = require('chromadb');
+const embedder = new OllamaEmbeddingFunction({
+    url: "http://localhost:11434/api/embeddings",
+    model: "nomic-embed-text"
+})
+
+// use directly
+const embeddings = embedder.generate(["Here is an article about llamas..."])
+```
+
+For Golang you can use the `chroma-go` client's `OllamaEmbeddingFunction` embedding function to generate embeddings for
+your documents:
+
+```go
+package main
+
+import (
+	"context"
+    "fmt"
+	ollama "github.com/amikos-tech/chroma-go/ollama"
+)
+
+func main() {
+	documents := []string{
+		"Document 1 content here",
+		"Document 2 content here",
+	}
+	// the `/api/embeddings` endpoint is automatically appended to the base URL
+	ef, err := ollama.NewOllamaEmbeddingFunction(ollama.WithBaseURL("http://127.0.0.1:11434"), ollama.WithModel("nomic-embed-text"))
+	if err != nil {
+        fmt.Printf("Error creating Ollama embedding function: %s \n", err)
+    }
+	resp, err := ef.EmbedDocuments(context.Background(), documents)
+	if err != nil {
+        fmt.Printf("Error embedding documents: %s \n", err)
+    }
+	fmt.Printf("Embedding response: %v \n", resp)
+}
+```
+
+!!! note "Golang Client"
+
+    You can install the Golang client by running the following command:
+
+    ```bash
+    go get github.com/amikos-tech/chroma-go
+    ```
+    
+    For more information visit [https://go-client.chromadb.dev/](https://go-client.chromadb.dev/)