More detailed report messages

Given the following code:

```csharp
namespace ConsoleApp1
{
class Program {
static void Main(string[] args)
{
Console.WriteLine ("Hello World!");
}
}
}
```

Running `dotnet-format --dry-run` gives the following output:

```
Formatting code files in workspace 'C:\dev\xt0rted\actions-playground\Application.sln'.
src\ConsoleApp1\Program.cs(5,18): Fix whitespace formatting.
src\ConsoleApp1\Program.cs(8,30): Fix whitespace formatting.
Formatted code file 'Program.cs'.
Format complete in 4450ms.
```

The two violations have the same message of `Fix whitespace formatting` but there's no indication as to what the formatting issues are. The first error is `csharp_new_line_before_open_brace` and the second is `csharp_space_between_method_declaration_parameter_list_parentheses`.

At the very least the rule names should be included in the output, but more descriptive messages would be best. Knowing that the first issue is because there needs to be a new line before the brace, and the second issue is because there shouldn't be a space after the method declaration, is a lot more helpful then being told there's a generic whitespace issue.

Other linters such as ESLint and StyleLint produce a report in the [stylish format](https://eslint.org/docs/user-guide/formatters/#stylish) which has the rule name a violation message. The [compact format](https://eslint.org/docs/user-guide/formatters/#compact) is most similar to what's being used now though.