feat(tools): implement CRUD operations for thoughts and projects

* Add tools for creating, retrieving, updating, and deleting thoughts.
* Implement project management tools for creating and listing projects.
* Introduce linking functionality between thoughts.
* Add search and recall capabilities for thoughts based on semantic queries.
* Implement statistics and summarization tools for thought analysis.
* Create database migrations for thoughts, projects, and links.
* Add helper functions for UUID parsing and project resolution.

internal/ai/factory.go

@@ -0,0 +1,22 @@
+package ai
+
+import (
+	"fmt"
+	"log/slog"
+	"net/http"
+
+	"git.warky.dev/wdevs/amcs/internal/ai/litellm"
+	"git.warky.dev/wdevs/amcs/internal/ai/openrouter"
+	"git.warky.dev/wdevs/amcs/internal/config"
+)
+
+func NewProvider(cfg config.AIConfig, httpClient *http.Client, log *slog.Logger) (Provider, error) {
+	switch cfg.Provider {
+	case "litellm":
+		return litellm.New(cfg, httpClient, log)
+	case "openrouter":
+		return openrouter.New(cfg, httpClient, log)
+	default:
+		return nil, fmt.Errorf("unsupported ai.provider: %s", cfg.Provider)
+	}
+}