added example program for testing

engine.go

@@ -1,6 +1,8 @@
 package tether
 
 import (
+	"log/slog"
+
 	"github.com/wisplite/tether/reactivity"
 	"gorm.io/gorm"
 )
@@ -13,15 +15,16 @@ type Engine struct {
 }
 
 func NewEngine(db *gorm.DB) *Engine {
+	slog.SetLogLoggerLevel(slog.LevelDebug)
 	return &Engine{db: db, channels: make(map[string]*reactivity.Channel), mutations: make(map[string]func(ctx *MutationCtx) error), queries: make(map[string]func(ctx *QueryCtx) error)}
 }
 
 func (e *Engine) RegisterMutation(name string, mutation func(ctx *MutationCtx) error) {
 	e.mutations[name] = mutation
+	slog.Debug("Registered mutation", "name", name)
 }
 
 func (e *Engine) RegisterQuery(name string, query func(ctx *QueryCtx) error) {
 	e.queries[name] = query
+	slog.Debug("Registered query", "name", name)
 }
-
-