feat!: Migrate to derive builder

[c12i]

Migrate the following APIs to the new builder pattern

• [x] account_balance
• [x] b2b
• [x] b2c
• [ ] c2b_register
• [ ] c2b_simulate
• [x] transaction_reversal
• [ ] transaction_status

[itsyaasir]

Transaction Reversal is done

[itsyaasir]

Migrated b2c and b2b services https://github.com/c12i/mpesa-rust/pull/112