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/observability/logger.go

@@ -0,0 +1,52 @@
+package observability
+
+import (
+	"fmt"
+	"io"
+	"log/slog"
+	"os"
+	"strings"
+
+	"git.warky.dev/wdevs/amcs/internal/config"
+)
+
+func NewLogger(cfg config.LoggingConfig) (*slog.Logger, error) {
+	level, err := parseLevel(cfg.Level)
+	if err != nil {
+		return nil, err
+	}
+
+	options := &slog.HandlerOptions{Level: level}
+	handler, err := newHandler(cfg.Format, os.Stdout, options)
+	if err != nil {
+		return nil, err
+	}
+
+	return slog.New(handler), nil
+}
+
+func parseLevel(value string) (slog.Leveler, error) {
+	switch strings.ToLower(strings.TrimSpace(value)) {
+	case "", "info":
+		return slog.LevelInfo, nil
+	case "debug":
+		return slog.LevelDebug, nil
+	case "warn", "warning":
+		return slog.LevelWarn, nil
+	case "error":
+		return slog.LevelError, nil
+	default:
+		return nil, fmt.Errorf("invalid logging.level %q", value)
+	}
+}
+
+func newHandler(format string, w io.Writer, opts *slog.HandlerOptions) (slog.Handler, error) {
+	switch strings.ToLower(strings.TrimSpace(format)) {
+	case "", "json":
+		return slog.NewJSONHandler(w, opts), nil
+	case "text":
+		return slog.NewTextHandler(w, opts), nil
+	default:
+		return nil, fmt.Errorf("invalid logging.format %q", format)
+	}
+}