Added support for basic color escape sequencies on Debug Console

[rdegelo]

Added support for bold font style on Debug Console.

Background color can be easily implemented using the same approach.
If this PR gets accepted, I can add background colors support.

[msftclas]

All CLA requirements met.

[rdegelo]

Related to issue: Microsoft/vscode-chrome-debug#282

[roblourens]

This looks great, but the font-weight doesn't appear to have any affect in the Debug Console. Is it working for you? I don't know whether vscode supports it.

[rdegelo]

It works for me:

console.log('%c Normal font weight ', 'color: blue');
console.log('%c Normal font weight ', 'color: blue; font-weight: bold');

Result:

To check what is supported, you can see this file:
https://github.com/Microsoft/vscode/blob/master/src/vs/workbench/parts/debug/browser/debugANSIHandling.ts#L70

[roblourens]

I see it, the problem is that the debug console uses the Monaco font on macos, which doesn't support a bold font weight. Will take that upstream...

[rdegelo]

Cool,
When I have time I'll add background/underline support and post a new PR.