[Feat] - derive new account name from wallet (Mobile+Ext)

[akanoce]

Is your feature request related to a problem? Please describe.
When handling multiple wallets in your VeWorld, i find myself changing the account name to reflect the wallet's one every time i create one.

Describe the solution you'd like
Derive the new account name from the wallet's one

I.e new wallet from 🔐 Personal should be
🔐 Personal #1

Tasks:

• R1: Release the algorithm to change existing accounts under a wallet once changed.
• R2: Implement the import.
• R3: Implement the create wallet.

AC:

• Designs approved for import/wallet creation naming flow.
• Alg to preserve the names of accounts under a wallet if they have been changed. See example below.
• Account names can still be changed, this is just the default name.

Example:
Alice has 4 wallets under an account.
Alice renamed first account called - alice1
Alice renamed second account called - alice2
Alice hasn't changed account 3
Alice hasn't changed account 4
Alice changes wallet name to - VBD
The wallets are now called:

1. alice1
2. alice2
3. VBD 3
4. VBD 4

If Alice creates a new account under the wallet:

1. alice1
2. alice2
3. VBD 3
4. VBD 4
5. VBD 5

[BenMVeChain]

Points from refinement.

• Do we offer name rechange in import flow & creation flow.
• If a user changes the wallet of an existing wallet, we keep any account name and preserve it that has been manually changed before - so != Account n.
• Design required for the import/creation flow.

[akanoce]

If a user changes the wallet of an existing wallet, we keep any account name and preserve it that has been manually changed before - so != Account n.

so != Account n.

I think here we should take into account the new generated names (i.e based on the wallet's one) so we avoid overriding an account manually renamed by the user after he changes the wallet's one for any reason