Floating Toolbar Ideal Version

[chipsnyder]

Fixes: #1414
Related PRs:
gutenberg: WordPress/gutenberg#20971

Description

This PR is currently still a spoke being opened to help share progress. This adds additional library components that are still being discussed on where they should ideally live

To Run:

Pre-condition: Make sure you also have the correct gutenberg branch pulled down

Android:

Make sure you run yarn android to install the new gradle dependencies.
You can also open Android Studio and build for your device if desired.

iOS:

Make sure you run yarn ios to install the local development Pod.
You can then open Xcode and build for your device if desired.

Known Issues:

1. iOS: Tapping on an InnerBlock inside a Group will select the InnerBlock before the Group.
2. Android: Long pressing on the toolbar allows the cursor to move to the overlapped Block without selecting it.

PR submission checklist:

• I have considered adding unit tests where possible.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

[chipsnyder]

Closing this PR as we explore other options: #1414 (comment)

[chipsnyder]

Renamed the original branch to spike/floatingToolbar_OverflowView to make it more clear