Add new "Shortcuts" global dialog

[marcinbauer85]

Description

This design proposes a global place where we can define a list of every shortcut in HA. The goal is to make the shortcuts more discoverable.

Looking forward to working with someone that can help make this happen :)

Note

Detailed notes and previews can be found in the Figma file.

Design & Notes

https://www.figma.com/design/ZqEncpHiF21M4DYHgjebCW/PDX-1967-Improve-shortcuts-discoverability?node-id=4002-495&t=v4IcgjLN10xRy4Nb-11

- Product designer @ the Open Home Foundation Product Team

[jpbede]

#24918