* Add support for new jupyter book version
* Add changes to the jupyter notebook to create books
* Create config file
* Add support of new version of jupyter book on ADS
* Fix paths for opening folder with v1 and v2 books
* Add tests for jupyter book v2
* Update tests
* Fix tests
* Fix get parent issue
* Address PR comments
* Fix bookVersion condition in getSections and fix issue on create book notebook
* Fix search
* update python notebook
* Remove commented lines
* add saved/untitled views to the books viewlet and provide save option to untitled
* addressed comments
* fixes after merge
* await on async methods
* reverted back
* await on promise
* added localize for books view names
* initial commit
* missed a file change
* changes to make the merges work part1
* fixes after merges 2
* getChildren to get all books
* chnages to address comments
* fsPromises instead of fs.readSync
* merged master
* replaced deprecated fs.exists async call with pathExists
* renamed method
* Add abillity to open to specific item within a Jupyter book
* Move helper method into BookTreeItem class
* Fix default URL path
* Add typing to Jupyter book code
* Update comment and typings
* Fix compile error and cleanup
* initial commit
* fix: added initialize method to fix the previous/next links rendering
* added checks
* open first markdown/ipynb in the book ans expand the view
* added launch book from command pallete, removed the pick folder and save option added launching the first notebook/markdown
* moved the open book command pallet action from mssql to notebooks
* open as untitled to true
* opening markdown files issue fix
* removed opening as untitled files
* open ipynb files as untitled and changes for previous&next links to work
* add books as seperate viewlet
* localize double quote issues and renamed treeCollapsibleState
* renames and added logic to conditionally show Preview command
* moved registerCommands from widget to extension contribution
* isEditorUntitled check
* async comment updates
* formatting issues.
* promisfying the async calls
* moved existsAsync to top
* added previous and next buttons
* previous and next notebook API
* links for prev/next notebooks
* fixed first and last pages
* made code more readable
* addressed Kevin's comments
* moved logic over to BookTreeItem
* show buttons in dev mode only
* added BookTreeItemFormat interface
* added interface and enum
* removed localize call
