[Orgs] Add Safe accounts - Manual

[usame-algan]

Links

Epic on Notion: https://www.notion.so/safe-global/Org-onboarding-flow-1208180fe57380078591f5380a0c5d2a

What must be done

• Create an option to manually add a safe account in the add accounts form

Designs/sketches

https://www.figma.com/design/PeChIDi5UKPjf58IOChtET/Organizations?node-id=3547-8691&t=G21g4Sf0j45ceO56-0

How to test it

1. Open an org
2. Add a safe account
3. Observe there is a Add manually button
4. Press the button
5. Type in the safe address and network and submit
6. Observe the safe is showing up checked in the list of safes
7. Submit the Form
8. Observe the safe has been added