Refactor configuration and update handling:

- Modify .luarc.json to include global Lua scripts.
- Update Makefile to include LDFLAGS for versioning.
- Enhance node.go to implement version checking and update handling.
- Refactor Lua global variables in _globals.lua and echo.lua to use new structures.
- Remove deprecated http.lua and update config.yaml for TLS and update settings.
- Introduce new update.go for version management and update checking.
- Add tests for version comparison in update_test.go.
- Improve error handling in various server methods.

core/logs/mock.go

@@ -0,0 +1,35 @@
+package logs
+
+import (
+	"context"
+	"log/slog"
+	"sync"
+)
+
+type MockHandler struct {
+	mu   sync.Mutex
+	Logs []slog.Record
+}
+
+func NewMockHandler() *MockHandler {
+	return &MockHandler{}
+}
+
+func (h *MockHandler) Enabled(_ context.Context, _ slog.Level) bool {
+	return true
+}
+
+func (h *MockHandler) Handle(_ context.Context, r slog.Record) error {
+	h.mu.Lock()
+	defer h.mu.Unlock()
+	h.Logs = append(h.Logs, r.Clone())
+	return nil
+}
+
+func (h *MockHandler) WithAttrs(_ []slog.Attr) slog.Handler {
+	return h
+}
+
+func (h *MockHandler) WithGroup(_ string) slog.Handler {
+	return h
+}