[Nacos 3.0] Enhance usage material for distributed locks.

[KomachiSion]

In GLCC 2023, Nacos community has finished the basic usage for distributed locks and plan to add this feature into nacos 3.0 version.

During one year development, the default branch and 3.0 branch include many changes and growing, the feature branch of distributed locks has many below and conflicts with 3.0 branch.

So community hope someone help to solve these conflicts first and add whole tests (unit test or integration test) for distributed locks feature.

Finally, community also hope someone can help to fill more usage document about distributed locks feature in nacos, which make users can use the feature well.

So sub tasks following:

• solve conflicts for brach summer-glcc#10378 with 3.0 develop branch and make sure feature can be used well.
• Add more complete tests such as unit test or integration test to ensure the feature.
• Add usage document includes usage document and description document.

[KomachiSion]

relative #10378

[shalk]

i create sub issue 12954