* 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
* 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
* initial commit: new modelview widget that shows books
* moved the new command action to notebook contribution and addressed the comments
* localize changes
* removed changes from src/vs file and string changes
* make directory for each contribution
* typo fix
