chore: moved packages to v1

v1/core/handler.go

@@ -0,0 +1,13 @@
+package core
+
+import mcontext "github.com/abelith/gomax/v1/context"
+
+type HandlerFunc func(c *mcontext.Context) error
+
+func (h HandlerFunc) HandleUpdate(c *mcontext.Context) error {
+	return h(c)
+}
+
+func (h HandlerFunc) Use(_ ...Middleware) {
+	panic("HandlerFunc.Use must never be called")
+}