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.

.luarc.json

@@ -2,6 +2,5 @@
   "runtime.version": "Lua 5.1",
   "workspace.library": [
     "./scripts/_globals.lua"
-  ],
-  "diagnostics.globals": ["Params", "Result"]
+  ]
 }