Shortcuts: Copy note text intent

[charliescheer]

Fix

Okay. so in #1584 I said that was the last shortcut intent I was adding, but then I thought of two more that were too good to pass up.

So first, copy note text. This intent will fetch a selected note or given note and then copy the full text content and return it from the shortcut. This will allow users to connect the content in their notes to any other shortcut they might want to use it with. Pretty neat right?

This intent on it's own doesn't do much, but combined with search intents and output intents it has a lot of potential

Test

(Required) List the steps to test the behavior. For example:
Okay so easiest way to test this one.

1. build the app, background the app, go to shortcuts, add a shortcut and then tap on add action
2. Find Simplenote and select "Copy Note Content"
3. Select a note (we will test accepting a note from another shortcut in the next PR so we can skip that for now)
4. then at the bottom tap on the x to dismiss the Simplenote modal hiding at the bottom
5. in the search field that appears type in "clipboard" and then select the copy to clipboard shortcut. This will connect the output of the "Copy Note Content" shortcut to the copy to clipboard shortcut.
6. go to another app where you can paste text and attempt to past the text from the note you just copied.

Review

(Required) Add instructions for reviewers. For example:

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

Release

These changes do not require release notes. (tied up with another PR that did have release notes

[wpmobilebot]

You can test the changes in simplenote-ios from this Pull Request by:

• Clicking here or scanning the QR code below to access App Center
• Then installing the build number pr1585-58c13b4-018f5f8d-5d6d-486e-8323-ba43d5921ea4 on your iPhone

If you need access to App Center, please ask a maintainer to add you.

[jleandroperez]

Works as expected!!