532 uiux add slash command modal (#555)

* WIP slash commands

* add slash command image

* WIP slash commands

* slash command menu feature complete

* move icons to slash command local

* update how slash command component works

* relint with new linter

* Finalize slash command input
Change empty workspace text layout
Patch dev unmount issues on Chatworkspace/index.jsx

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Co-authored-by: timothycarambat <rambat1010@gmail.com>