861042c27e
[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)  |
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