Shortcuts: Open New Note Shortcut

[charliescheer]

Fix

More of a proof of concept that shortcuts work on Mac, more than anything else, this first shortcuts PR simply adds a native MacOS shortcut that can open Simplenote, create a new note, and then open that note in the editor.

So that is what this PR does. Building on the addition of the intents extension, here I am creating a flow to use the shortcuts app to create a new note.

Relies on: #1155
Moves forward #1145

Test

1. build Simplenote. Open the shortcuts app, add a new shortcut, search for Simplenote and choose "Open a new note in Simplenote"
2. hit the play button to run the shortcut

• confirm that Simplenote opens and a new note is created, then displayed in the editor

Review

(Required) Add instructions for reviewers. For example:

Only one developer is required to review these changes, but anyone can perform the review.

Release

(Required) Add a concise statement to RELEASE-NOTES.txt if the changes should be included in release notes. Include details about updating the notes in this section. For example:

These changes do not require release notes.

[jleandroperez]

@charliescheer not building on my end!! can I trouble you to merge the base branch in?

Thank youuuu

[charliescheer]

I identified an issue with the signing certificates/intents extension and removed a duplicate target we no longer needed in another PR. These changes are more easily rebuilt on top of that branch then where they are currently. Gonna close this PR in favor of ones I will replace it with shortly