Full support for BIP44 in Wallet interface

**Feature description**

Full support for BIP44 in `Wallet` interface

**Is your feature request related to a problem? Please describe.**
It is not possible to cover the complete address space of a given BIP44 wallet

**Describe the solution you'd like**
Modify signature of some methods so as to consider all parameters involved in BIP44 address generation. In this approach there is a single wallet object with methods receiving potentially infinite account indices .

**Additional context**
For the moment SkyFiber plugin must only support `account=0`. Attempts to use a different index shall return invalid account index error .

**Describe alternatives you've considered**
The current approach works from BIP44 `account'` node moving down the hierarchy . Nonetheless it leads to unnecessary object explosion due to potential use of infinite accounts , each of those hence requiring a separate object and memory space.

**Possible implementation**

- [ ] Add account index and account type parameters in `Wallet.GetLocalAddresses`
- [ ] Add account index parameter in `Wallet.GenerateAddresses()`
- [ ] Add CRUD methods in `Wallet` interface for account names
- [ ] Implement aforementioned methods in SkyFiber plugin