Fixes bug where files located in a subfolder defined before the folders themselves in .sqlproj would result in those files not appearing in the ADS treeview
* Checkpoint
* Adding mock contents for tree
* added open sqlproj dialog
* reading files from directory
* Added directory traversal
* Adding tree sorting by folder vs file and label
* Improved auto-unfolding of tree based on node type
* replacing fs with fs.promise alias
* PR feedback
* added activation event for when workspace contains sqlproj files
* Returning after displaying error
* Fixing linter errors
* Reworked tree
* Fixing missing grandchildren
* Correcting tree URI construction
* Refactoring to isolate tree item responsibilities from data model responsibilities
* project file parsing
* constructing tree from project files rather than filesystem
* Fixing double-initialization
* Changing projectEntry to take enum for file type
* Correct node type for project item
* Parsing datasources.json
* Child nodes for sql data source
* Localizing strings
* Checkpoint
* Adding mock contents for tree
* added open sqlproj dialog
* reading files from directory
* Added directory traversal
* Adding tree sorting by folder vs file and label
* Improved auto-unfolding of tree based on node type
* replacing fs with fs.promise alias
* PR feedback
* added activation event for when workspace contains sqlproj files
* Returning after displaying error
* Fixing linter errors
* Reworked tree
* Fixing missing grandchildren
* Correcting tree URI construction
* Refactoring to isolate tree item responsibilities from data model responsibilities
* project file parsing
* constructing tree from project files rather than filesystem
* Fixing double-initialization
* Changing projectEntry to take enum for file type
* Correct node type for project item
* Parsing datasources.json
* Child nodes for sql data source
* Localizing strings
* missed file in merge
* changed extension method to helper
* cleanup
* Adding docstrings