Manual instrumentation support

[minimAluminiumalism]

Is your feature request related to a problem? Please describe.

Does this project support manual instrumentation?

Describe the solution you'd like

想问一下目前这种自动插桩的方式支持手动埋点吗？比如我们需要在代码里面打印 trace id 方便排查问题，现在好像没看到相关的文档

Describe alternatives you've considered

No response

Additional context

No response

[123liuziming]

Using opentelemetry-go SDK is recommended. I will add a example later.

[123liuziming]

I 've added a example and document about adding traceId or spanId manually in your log. If you want to do the other operation like creating/ending span, you can just use other method in https://github.com/open-telemetry/opentelemetry-go