feat(ai): add support for Ollama AI provider configuration

* Update README with Ollama integration details
* Add Ollama configuration to example YAML files
* Implement Ollama provider in AI factory
* Add tests for Ollama provider functionality
* Enhance config validation for Ollama settings

internal/ai/ollama/client.go

@@ -0,0 +1,24 @@
+package ollama
+
+import (
+	"log/slog"
+	"net/http"
+
+	"git.warky.dev/wdevs/amcs/internal/ai/compat"
+	"git.warky.dev/wdevs/amcs/internal/config"
+)
+
+func New(cfg config.AIConfig, httpClient *http.Client, log *slog.Logger) (*compat.Client, error) {
+	return compat.New(compat.Config{
+		Name:           "ollama",
+		BaseURL:        cfg.Ollama.BaseURL,
+		APIKey:         cfg.Ollama.APIKey,
+		EmbeddingModel: cfg.Embeddings.Model,
+		MetadataModel:  cfg.Metadata.Model,
+		Temperature:    cfg.Metadata.Temperature,
+		Headers:        cfg.Ollama.RequestHeaders,
+		HTTPClient:     httpClient,
+		Log:            log,
+		Dimensions:     cfg.Embeddings.Dimensions,
+	}), nil
+}