chore: move itc script to ps1 file

[scottdover]

Summary:
This moves our itc script into a ps1 file. To accomplish this, the following changes were made:

• Tags & line codes were moved to a json file that our .ps1 script and .ts files could read
• A new file, itc.ps1 was created with our powershell code from script.ts
  • Changes were made such that interop library path is now read from an environment variable,
    as is all of our tags & line codes
• GetInteropDirectory.psm1 was created as a shareable module to load sas interop dlls

As a result:

• We now have a color-coded, format-able powershell script instead of a string for itc connections
• itc-connection-test.ps1 has been updated to use this new script (and the shared interop module)

Testing:

• Make sure npm run watch generates/watches for file changes (with empty client/dist directory)
  • Make sure itc files get updated as expected
• Make sure general itc functionality works as expected
• Made sure itc-connection-test ran successfully with the instructions provided