Import missing key pair by entering private key inside wallet settings

[seanstrom]

Feature Issue

User Story

As a user,
I want to be able to import a missing key pair by entering a recovery phrase while inside the wallet settings.

Description

Implement the UI and UX flow inside the wallet settings for importing a key pair by entering a recovery phrase.

Designs

Figma flow: the Figma designs

Notes

Acceptance Criteria

Screen	Description
	Users can choose to view the key pairs and accounts settings (inside wallet settings) by pressing on the "Key pairs and accounts" menu button.
	Users should be able to see any missing key pairs and accounts. Missing key pairs and accounts would exist on other devices but not on the current device.
	Users should be able to open the action menu for a missing key pair. And a user should be able to press the "Import by entering private key" action
	A user should see the screen for entering the private key.
	When a user pastes an invalid private key, then the user should see a validation error.
	When a user submits the incorrect private key for the key pair, then the user should see a validation error
	When a user pastes a valid private key, then the user should see no validation errors. And the user should be allowed to use the "Slide to import" button to confirm the private key. And the user will be required to authenticate this action.
	When a user finishes importing a key pair, then the user should see a success toast.