New rule: Method parameters should comply with a naming convention

### Prerequisites

- [x] This rule has not already been suggested.
- [x] This should be a new rule, not an improvement to an existing rule.
- [x] This rule would be generally useful, not specific to my code or setup.

### Suggested rule title

Method parameters should comply with a naming convention

### Rule description

This rule will check if a method parameter is in PascalCase and (optionally) has a certain prefix. The prefix will default to nothing.

### Rationale

It's a common Delphi convention to prefix arguments with `A`, like in the example below:

```delphi
procedure Example(AMyInt: string);
var
MyStr: string;
begin
// ...
end;
```

This would enforce this convention in the same way similar conventions are supported for other language constructs (type names, constant names, etc.).