Added keybinds/shortcuts

[cloudiees]

Addresses #9

Added keybinds for all tools
(Note the numbers are the number row and not numpad numbers)
1 $$\rightarrow$$ Toggles displace
2 $$\rightarrow$$ Toggles move
3 $$\rightarrow$$ Toggles add
4 $$\rightarrow$$ Toggles delete
5 + a state is selected $$\rightarrow$$ Opens controls
6 $$\rightarrow$$ Toggles connect
Ctrl + S $$\rightarrow$$ Save FSM
Delete + a state is selected $$\rightarrow$$ Deletes selected state
Escape $$\rightarrow$$ Deselects whatever tool is currently selected, and closes Save FSM popup

1 major code change due to this implementation, the delete code that was previously in handleNodeClick for deleting a node has been moved to a function to allow the delete keybind to work.

[vercel]

@cloudiees is attempting to deploy a commit to the Karthik Saiharsh's projects Team on Vercel.

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