Implement the VeChain Data Model

[lucanicoladebiasi]

The core of the SDK can be simplified in terms of usability and cost of maintenance implementing a consistent data model adopting the TS Object Oriented Programming paradigm. The epic is split in a number of sub-tasks introducing and implementing the data model gradually

• [x] #1103
• [x] #1104
• [x] #1105
• [x] #1107
• [ ] #1108
• [x] #1109
• [x] #1110
• [ ] #1112
• [x] #1113
  • [x] #1114
• [x] #1115
  • [x] #1106
  • [x] #1111
• [x] #1117
  • [x] #1116
• [ ] #1118
• [ ] #1119
• [ ] #1120
• [x] #1121
• [x] #1122
• [ ] #1162
• [ ] Adapt to FPN the classes that uses the currency interface.

Each task tasks addresses a specific SDK package and should include updated documentation and examples.

[lucanicoladebiasi]

The Class UML diagram of the VeChain Data Model is at https://github.com/vechain/vechain-sdk-js/blob/main/docs/diagrams/architecture/vcdm.md