* add improvements TODO on creating book experience
* fix create book to support a more complex folder structure
* replace \\ to a forward slash on windows
* address pr comments
* fix tests
* use the posix version of path.sep
* Add dialog for creating books
* create empty book
* add localized constants
* add validation to dialog
* reset the create book command to original
* address pr comments
* change error message
* Init book toc manager in bookTreeView
* fix not numbered field
* fix for adding extra field and removing it from sections
* use const for variable
* use spread operator to create new object
* address pr comments
* change function name and simplify
* Add comment and put the initializeContents in the finally block
* start work on ui
* Move notebooks complete
* Simplify version handling
* fix issues with add section method
* fix issues with the edit experience and add the quick pick for editing
* add version handler for re-writing tocs
* fix book toc manager tests
* add notebook test
* fix localize constant
* normalize paths on windows
* check that a section has sections before attempting to mve files
* Implement method for renaming duplicated files
* moving last notebook from section converts the section into notebook
* Add recovery method restore original state of file system
* Add clean up, for files that are copied instead of renamed
* remove dir complexity
* divide edit book in methods for easier testing and remove promise chain
* Keep structure of toc
* normalize paths on windows
* fix external link
* Add other fields for versions
* fix paths in uri of findSection
* add section to section test
* Add error messages
* address pr comments and add tests
* check that the new path of a notebook is different from the original path before deleting
* Add interface for modifying the table of contents of books
* Add logic for creating toc
* Fix issue with toc
* Add test for creating toc
* Delete bookTocManager.test.ts
* update allowed extensions
* Fix failing tests and add test
* Add tests for creating books
* Remove unused methods
* add section to section
