[Preview this branch](https://cosmos-explorer-preview.azurewebsites.net/pull/762?feature.someFeatureFlagYouMightNeed=true)
The main change in this PR fixes the snapshot functionality in the Publish pane-related components. Because the code cell outputs are now rendered in their own iframes for security reasons, a single snapshot of the notebook is no longer possible: each cell output takes its own snapshot and the snapshots are collated on the main notebook snapshot.
- Move the snapshot functionality to notebook components: this removes the reference of the notebook DOM node that we must pass to the Publish pane via explorer.
- Add slice in the state and actions in notebook redux for notebook snapshot requests and result
- Add post robot message to take snapshots and receive results
- Add logic in `NotebookRenderer` to wait for all output snapshots done before taking the main one collating.
- Use `zustand` to share snapshot between Redux world and React world. This solves the issue of keeping the `PanelContainer` component generic, while being able to update its children (`PublishPanel` component) with the new snapshot.
Additional changes:
- Add `local()` in `@font-face` to check if font is already installed before downloading the font (must be done for Safari, but not Edge/Chrome)
- Add "Export output to image" menu item in notebook cell, since each cell output can take its own snapshot (which can be downloaded)
* Add Telemetry to command bar buttons
* Count and report # of files/notebooks/directories in myNotebook to telemetry
* Add resource tree clicks to Telemetry
* Log to Telemetry: opened notebook cell counts by type, kernelspec name
* Fix unit test
* Move Telemetry processor call in notebook traceNotebookTelemetry action from reducer to epic. Use action to trace other info.
* Fix react duplicate key error
* Log notebook cell context menu actions
* Reformat and cleanup
* Move resource tree tracing code out of render(). Only call once when tree is updated
* Fix build issues
* Upgrade nteract packages and related dependencies to make new stateful-component work
* Switch to new monacoEditor
* Configure store using nteract mythic configuration
* Replace CodeMirror with Monaco editor in NotebookReadOnlyRenderer
* Reformat
* Upgrade d3 to latest to resolve d3-selection conflicts with nteract/data-explorer that broke D3ForceGraph
* Upgrade jupyterlab terminal widget to work with latest version of react. Upgrade jupyterlab services to include latest fix for websocket auth
* Update jest test snapshots
* Upgrade packages to fix build issues
* Remove comment
* Fix unit tests
* Fix unit test snapshot
* Remove useless @types/node-fetch
