[Feature Request] Support for keyboard mappings

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**Graph Explorer Version (and Graph Database and Version used if applicable)**
All versions

**Is your feature request related to a problem? Please describe.**
When I want to quickly take an action using the keyboard (e.g., using the delete key to delete a displayed node/edge), this does not work with Graph Explorer. Other actions like ctrl/command+Z for undoing actions would be nice as well.

**Describe the solution you'd like**
Mapping of actions like delete, ctrl/command+Z, ctrl+a to the Graph Explorer app

**Additional context**
Add any other context or screenshots about the feature request here. Describe any alternatives you've considered.