Suggesstion: split v2 & v3 & lite api in tonclient

[witter-deland]

First of all, thank all contributors for their code contributions.
During the use process, I have some thoughts and suggestions, as follows:

1. Problem: V2 and V2 API are different. They are provided separately because of their differences. For example, GetTransactionsV2 and TranasactionsV3, TranasactionsV3 can query a transaction for a TxHash. The two have different functions. When they are combined, the query function for TxHash is hidden.

2. Solution: You can add V2, V3, etc. to the API method name, so that developers can use the official V2 and V3 methods freely without the encapsulation causing some functions to be castrated.

[purpleguy99]

Hi, thanks for the suggestion, you can add this implementation via pull request, if you want to see it faster in TonSDK.Net, otherwise, i dont plan to make any new update in incoming month