Add/Improve documentation on github

[Komediruzecki]

Current behavior

No documentation for boost note local

Expected behavior

Have some FAQs, documented features, change-list, etc.

[Komediruzecki]

Basic Wiki and docs added to repository: https://github.com/BoostIO/BoostNote.next-local/wiki

Changelog: https://github.com/BoostIO/BoostNote.next-local/blob/master/CHANGELOG.md

More coming soon