Improve Dart API - use named parameters instead of `XXXParameters` objects

### Describe the problem you discovered

I think the action parameters are heavy to use.

For example, I suggest doing :

```dart
final getBlockNumberReturnType = await wagmi.Core.getBlockNumber(
chainId: account!.chain!.id,
cacheTime: 4000,
);
```

instead of :
```dart
final getBlockNumberReturnType = await wagmi.Core.getBlockNumber(
wagmi.GetBlockNumberParameters(
chainId: account!.chain!.id,
cacheTime: 4000,
),
);
```

Start at the Dart API entry point for wagmi.Core.getBlockNumber and inspect how GetBlockNumberParameters and similar XXXParameters types are defined and used. Determine the intended scope across the API, then confirm that the affected actions support the named-parameter calling style shown in the issue without requiring parameter objects.

Written by the indexing model from the issue text.