Add apply theme on output redirection option

[tjaart]

What issue does this PR address?
color themes not appearing in output #64
#64

Does this PR introduce a breaking change?
An option is added to the Console() extension method but should not be a breaking change as it is added at the back with a default value of false, meaning it will have no effect unless explicitly activated.

Please check if the PR fulfills these requirements

• The commit follows our guidelines
• Unit Tests for the changes have been added (for bug fixes / features)

Other information:
Debugging the unit tests breaks for some reason. Console.IsOutputRedirected is always false when debugging on my machine with Rider. However Running the tests normally works.

[nblumhardt]

Thanks for taking this on 👍

Adding a parameter to a method is a breaking change in C#, even if its given a default value, since the value is substituted in at the call site at compile time; code built against the earlier version will try to bind based on the old method signature and fail.

In other sinks, particularly File() since it's sometimes used as an implementation detail of other components, we've worked around this using an overloading scheme, but for console I think we're okay just making the change and bumping the major version (which is in Serilog.Sinks.Console.csproj).

Came up with another possible parameter name based on your suggested direction (which is great), let me know what you think :-)