Accounts removal questions and TODOs

[thibault-martinez]

The related PR: #1279

Questions:

• Do we need both WalletData and WalletInner? yes, but it should be renamed (Rename WalletData #1903)
• Should WalletData::bip_path really be optional ? yes, but the WalletBuilder should be changed (Add WalletBuilder::with_address_generation_method or something similar #1904)
• Do we really want to propagate the single address everywhere? (yes for now)
• Do we really want to remove RemainderValueStrategy::ChangeAddress? (yes for now)
• Do we want WalletBuilder::with_address? (no, needs change: Add WalletBuilder::with_address_generation_method or something similar #1904)
• Should we remove get_addresses_to_sync and similar functionality? (fn already removed?, but here is where we're requiring it)
• Do we still need AddressWithUnspentOutputs? (yes, but simplified: Cleanup wallet syncing code #1905)
• Should we keep bech32_hrp from Account in Wallet, and get_bech32_hrp ? (yes)

Questions (CLI):

• Merge both enums: WalletCommand CliCommand or just rename them? (no)
• Should we bring back addresses/new-address command? (no for now)
• Do we really want InitParameters Bip44 parsing the way it is here? (yes for now)
• Remove address from InitParameters? (sort of yes, Add WalletBuilder::with_address_generation_method or something similar #1904)
• Bring back addresses_balance method? There is WalletCommand::Balance (yes, Bring back addresses_balance method #1907 )

Todos:

• Reorganise examples (in what way?) (skipped)
• Reorganise CLI (yes, Refactor CLI #1908 )
• Rename accounts_and_addresses examples (Rename accounts_and_addresses #1909)
• Rename WalletData (yes, Rename WalletData #1903)
• Uncomment/fix tests (Fix some tests #1910)
• Adapt the storage keys in sdk/src/wallet/storage/constants.rs (constants look good)

Potential bugs:

• Removing account_addresses and account_and_nft_addresses from can_output_be_unlocked_now just seems wrong (Update/Fix can_output_be_unlocked_now fn #1911)

[thibault-martinez]

Has been split into different issues