Improve the output method to the debug console at log point, etc.

[zero-plusplus]

In the current spec, if strings and objects are output at the same time, they are output separately.
I remember implementing this at the time, following the Node.js debugger adapter specification, but now they are treated as object labels and only one message is output.

Also, it seems that when multiple objects are output, they are grouped into one instead of being output individually.

I have decided to follow this specification. This allows users to define their own object descriptions, which is very useful when outputting detailed logs.

[zero-plusplus]

I finally decided to use a slightly different specification than the Node.js debugger adapter.
I will update the wiki after the release for the detailed specification.