Add --format to dotnet sln list

[jdraaijer-microsoft]

Add a --format option to dotnet sln list.

Closes #26303

Unresolved questions:

• [x] What should I do with the untranslated translation entries?
• [x] Is there a specific policy that says "don't have options with underscores", and if so, what should I replace console_with_header with, or are there better names for this?
• [x] Is there a good way to indicate that console_with_header is the default value?
• [ ] Add tests that validate the output

[baronfel]

What should I do with the untranslated translation entries?

Don't worry about these - there's an out-of-band process that ships the untranslated entries to our localization team, they make adjustments, and then they send those changes back to us in a PR.

[Frulfump]

@jdraaijer-microsoft Will you get back to this PR at some point?