feat: add support for scripting/routines

[callmehiphop]

Closes #578 🦕

• Ensure the tests and linter pass
• Code coverage does not decrease (if any source code was changed)
• Appropriate docs were updated (if necessary)

[callmehiphop]

Usage can be viewed easily via system-tests

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[steffnay]

@googlebot I consent

[googlebot]

CLAs look good, thanks!

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[callmehiphop]

I consent

…

On Wed, Jan 29, 2020, 3:54 PM Steffany Brown ***@***.***> wrote: Heyo, @callmehiphop <https://github.com/callmehiphop> do you mind making the comment for the CLA, please? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#580?email_source=notifications&email_token=AANA2AYBN7GZRI5NF75P5T3RAHUIZA5CNFSM4JO4EXH2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEKIWQ2Q#issuecomment-579954794>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AANA2A65DRTVNT2J64AXH5DRAHUIZANCNFSM4JO4EXHQ> .