Implement starknet.go support for write endpoints

[jelilat]

Implement autogenerated starknet.go code for the following RPC endpoints

• starknet_addInvokeTransaction
• starknet_addDeployAccountTransaction

Additional Context:

• https://github.com/NethermindEth/rpc-request-builder/issues/1
• https://github.com/NethermindEth/rpc-request-builder/blob/main/src/api/rpcspec/methods.ts

[Richa-iitr]

Hey @jelilat, can i take this up? Also can i get the list of juno starknet go provider endpoints.

[Richa-iitr]

Hey @g4titan, i am on it. Will create a PR in a while.