Clipboardchange explainer: Event payload and permissions updates to make support interop (MicrosoftEdge#942)

* Updates regarding event payload and permissions

* Fix few grammatical errors

* Renamed permission and added considered alternate

* Update explainer with permission narrative

* Spell corrections

* Update based on latest discussion regarding no permission requirement

* Update explainer with no permission approach and API signature changes

* Address PR comments without refactor

* Refactored explainer

* Update intro and permission approach

* Fix comments

* Further fixes

* Update ClipboardAPI/clipboard-change-event-explainer.md

Co-authored-by: Dan Clark <[email protected]>

* Update ClipboardAPI/clipboard-change-event-explainer.md

Co-authored-by: Dan Clark <[email protected]>

* Update ClipboardAPI/clipboard-change-event-explainer.md

Co-authored-by: Sanket Joshi <[email protected]>

* Update ClipboardAPI/clipboard-change-event-explainer.md

Co-authored-by: Sanket Joshi <[email protected]>

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Co-authored-by: Dan Clark <[email protected]>
Co-authored-by: Sanket Joshi <[email protected]>

Author: 3 people