[New tutorial] Open Chrome API docs (condensed)

[AmySteam]

Initial PR#848 fits more into a robust/useful developer tool example. So It will be moved to a different folder. This is a simpler approach with less omnibox suggestions.

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User Story

As a web developer, I want to open extension API reference pages on Chrome, so that I can quickly learn how to use a specific extension API.

Bonus: A daily extension tip will be displayed as a popover after clicking the "tip" navigation list item.
(Currently, it requires Canary build and the "Experimental Web Platform features" flag enabled. The release date was moved to M114, so this approach may need to be abandoned if we want to launch before then.)

How to use it? Video demo

1. Enter the keyword "api" in the browser address bar.
2. Then, press "tab" or "space".
3. Enter the complete name of the API.
4. OR choose from a list of past searches
5. Select the API desired, and a new page will open to the Chrome API reference page.

[sebastianbenz]

Looks much better!

[AmySteam]

@sebastianbenz Thanks for all your insights!!! 💯 😊