Context: #5494
Context: #5241
Fixes: #5435

We added `--dsrouter` switch to both `dotnet-trace` and
`dotnet-gcdump`, which runs `dotnet-dsrouter` as a child process.

Many of `dotnet-dsrouter`'s console messages are pretty useful for
developers, but we are simply ignoring them:

    private static async Task ReadAndIgnoreAllStreamAsync(StreamReader streamToIgnore, CancellationToken cancelToken)
    {
        Memory<char> memory = new char[4096];
        while (await streamToIgnore.ReadAsync(memory, cancelToken).ConfigureAwait(false) != 0)
        {
        }
    }

To make this a bit more useful, we now log the output to either
`Console.Out` or `Console.Error` where appropriate.

If we simply did:

    string line;
    while ((line = await streamToRead.ReadLineAsync(cancelToken).ConfigureAwait(false)) != null)
    {
        output.WriteLine(line);
    }

This would work fine, but we'd lose all coloring.

`dotnet-dsrouter` uses `SimpleConsoleFormatter` to colorize its output:

https://github.com/dotnet/runtime/blob/aadcceeb03ce0ecbc2ad645de0feb10189daa64c/src/libraries/Microsoft.Extensions.Logging.Console/src/SimpleConsoleFormatter.cs#L163-L199

So, for now, a very simple solution is to check the known prefixes and
add coloring. This looks to have a pretty good result.

I also dropped the duplicate message:

    WARNING: dotnet-dsrouter is a development tool not intended for production environments.

Now that we print all of `dotnet-dsrouter`'s output, we can handle
this case and color it yellow.

Context: #5494
Context: #5241
Fixes: #5435

We added `--dsrouter` switch to both `dotnet-trace` and `dotnet-gcdump`,
which runs `dotnet-dsrouter` as a child process.

Many of `dotnet-dsrouter`'s console messages are pretty useful for
developers, but we are simply ignoring them:

private static async Task ReadAndIgnoreAllStreamAsync(StreamReader
streamToIgnore, CancellationToken cancelToken)
    {
        Memory<char> memory = new char[4096];
while (await streamToIgnore.ReadAsync(memory,
cancelToken).ConfigureAwait(false) != 0)
        {
        }
    }

To make this a bit more useful, we now log the output to either
`Console.Out` or `Console.Error` where appropriate.

If we simply did:

    string line;
while ((line = await
streamToRead.ReadLineAsync(cancelToken).ConfigureAwait(false)) != null)
    {
        output.WriteLine(line);
    }

This would work fine, but we'd lose all coloring.

`dotnet-dsrouter` uses `SimpleConsoleFormatter` to colorize its output:


https://github.com/dotnet/runtime/blob/aadcceeb03ce0ecbc2ad645de0feb10189daa64c/src/libraries/Microsoft.Extensions.Logging.Console/src/SimpleConsoleFormatter.cs#L163-L199

So, for now, a very simple solution is to check the known prefixes and
add coloring. This looks to have a pretty good result.

I also dropped the duplicate message:

WARNING: dotnet-dsrouter is a development tool not intended for
production environments.

Now that we print all of `dotnet-dsrouter`'s output, we can handle this
case and color it yellow.

<img width="2524" height="582" alt="image"
src="https://github.com/user-attachments/assets/4924ec93-c616-4511-83f8-f318f4ce4471"
/>