Provide default integration of configuration encryption plugin

[shihui-tang]

• It's too inconvenient to compile and package configuration encryption plugin by ourselves through this doc: https://nacos.io/zh-cn/docs/v2/plugin/config-encryption-plugin.html, why not provide a default integration of configuration encryption plugin to both nacos server and client?
• You can package default plugins into nacos release, and provide a new configuration to enable the default encryption plugin if necessary.

[KomachiSion]

Sounds good idea, after the plugin more stable, The community may release double version, with full default plugins release and pure release.

[shihui-tang]

Sounds good idea, after the plugin more stable, The community may release double version, with full default plugins release and pure release.

Great, looking forward to experience it