Fix broken links and add new sections on README.md · klever-io/klever-vm-sdk-rs@a53240b

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v3, giraffate/clippy-action@v1. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v3. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v3. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

Contracts / Rust tests: sdk/core/src/blockchain.rs#L9

unused imports: `ArgCreateTransaction`, `SendTransactionsResponse`

Contracts / Rust tests: sdk/core/src/blockchain.rs#L15

unused import: `itertools::Itertools`

Contracts / Rust tests: framework/derive/src/model/payable.rs#L16

method `no_kda` is never used

Contracts / Rust tests: vm/src/tx_execution/builtin_function_mocks/general/klever_asset_trigger_mock.rs#L4

unused import: `TxLog`