feat: Command Palette for searching accross the dashboard

[Fredkiss3]

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Summary

Add a command palette for searching pages accross the dashboard, triggered by cmd+k.

It includes 3 modes:

• the default mode show the list of pages accessible from the command bar by default
• Action mode, triggered by starting your search query with >, it will filter actions instead of pages (This is copied from Github)
• Search mode: which searches for sites, proxy & private resources, user devices & machine clients, whenever you starts to type 2 characters in the command input

Not in this PR:

• switching between organizations

Screenshots

command-bar.mp4