KXI-56563 Add structuredText and sampling to the VS Code wrapper

[acheung12]

Changes introduced by this PR

[ecmel]

@acheung12 The script gives an error on typeOf function. i_PRIMCODE and i_NONPRIMCODE should be defined inside the typeOf function as far as I can tell.

Also, for text results, the script does not return the actual calculated result.

[ecmel]

@acheung12 Regarding sampling (#490) it works when uncommented, we can add supporting extension code after we merge this PR. We will slightly modify this script then. (Add a sampleFn param and call the sample function accordingly instead of returning structuredText). Since the function works manually, I am uncommenting the part.