[KJots] Add StandardNoteActionManager

Summary:
This adds a class that stores note-related actions. Currently those are:

• Create Note
• Lock / Unlock
• Change Color

It also provides access to Akonadi::StandardActionManager, which allows to reuse the standard actions for:

• Book creation (akonadi_collection_create)
• Note / Book removal (akonadi_item_delete, akonadi_collection_delete)
• Copy link address (akonadi_item_copy, akonadi_collection_copy) - this is slightly buggy, see D29484: [StandardActionManager] Don't add PendingCutRole when copying
• ...and some other actions like "create resource" in the future

This was written with possible triple-column UI (like KMail / KAddressBook has) in mind, where item / collection views could be separated.

This slightly changes the behavior:

• "Delete selection" action (allowed to delete notes and books simultaneously) was removed
• "Delete Note / Book" are now disabled if note / book is locked
• They also now show confirmation dialog
• A slight change in terminology (instead of "Page" I suggest just using "Note"; TODO: need to do it consistently)

Test Plan: Tested changed actions, they seem to be functional

Reviewers: dvratil

Reviewed By: dvratil

Subscribers: kde-pim

Tags: KDE PIM

Differential Revision: https://phabricator.kde.org/D29538