Add get wallets for user

[mederic-p]

Closes #87

Overview

This PR adds the ability to retrieve the list of wallets for a user given his id or providerUserId

Changes

• Refactor paginated collection listing
• Add new api endpoint

Usage

        let paginationParams: PaginatedListParams<Wallet> = PaginatedListParams<Wallet>(page: 1, perPage: 10, sortBy: .address, sortDirection: .ascending)
        let params = WalletListForUserParams(paginatedListParams: paginationParams, userId: "usr_01cq97a3hgm49h8tw28evv5bg2")
        Wallet.getForUser(using: self.apiClient, params: params) { result in
            switch result {
            case let .success(data: paginatedWallets):
                let wallets = paginatedWallets.data
                print(wallets)
            case let .fail(error: error): print(error)
            }
        }