Update launch.json schema to add "code"

[int19h]

In addition to "program" and "module", debugpy also supports "code". This maps to Python command line as follows:

• python ...
  • ... foo.py: "program"
  • ... -m foo: "module"
  • ... -c print(123): "code"

The value can be a single string:

{
  ...
  "code": "import sys; print(sys.version)"
  ...
}

Or it can be an array of strings, in which case each string is treated as a separate line of code (i.e. they're joined together using \n):

{
  ...
  "code": [
    "import sys",
    "print(sys.version)",
  ],
  ...
}

[brettcannon]

We don't see how this would map back to the editor in order to do something useful. Plus, these hasn't been any upvotes.

[int19h]

FWIW the use case for this is to provide custom startup path for cases where "program" or "module" are inadequate (e.g. import a module and then run some function from it with specified arguments). I'm not sure what you mean by "mapping back to the editor"? The code is not viewable in the editor is a separate file that can be debugged, but for 2-3 lines of code this is supposed to be used with, it's not really a concern.

[brettcannon]

I'm not sure what you mean by "mapping back to the editor"?

How it ties into VS Code's UI/UX.