Implement new manual route setup UI

[jfschwarz]

Implement the new UI for manual route setup based on the mockups: https://www.figma.com/design/dVyATiS3RwYw3S2PrHPyX3/PIlot---Smart-Connection?node-id=12-77006&t=15Bf4u4RfPvzGIkZ-4

It shall replace our current connection edit form, but allow more deeply nested setups.

• What's still missing in the mock-ups is the step for entering the address+chain of the Target Safe. I assume we'll let users enter this upfront, before taking them to the route edit form.
• The Pilot node shall initially be populated with the connected wallet address. We still need to flesh out the flow for letting the user switch to a different Pilot account. I think it would be nice to keep track of all wallet addresses the user ever connected and suggest these. Also the user should be able to connect a fresh wallet address/switch their wallet to the desired address.
• Clicking on "Add new connection" will unfold a list of suggestions based on the account below. If it is a Safe, we query its owners and enabled modules and suggest these. If it is a Zodiac Modifier we suggest the modules enabled on it (getModulesPaginated()).