Add 'View project root' flag

[tpasternak]

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• [ ] I have filed an issue about this change and discussed potential changes with the maintainers.
• [ ] I have received the approval from the maintainers to make this change.
• [ ] This is not a stylistic, refactoring, or cleanup change.

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Discussion thread for this change

Issue number: <please reference the issue number or url here>

Description of this change

https://github.com/bazelbuild/intellij/assets/1066003/29720ae3-bc31-4b05-b9d6-da26d2e9b760

[tpasternak]

Oh, I can't just test it properly with the current test framework, because it converts TestFileSystem's files to NIO files via paths without hestitation, so as a result the tests would crash because it's impossible to call listFiles on it. I removed the comment (as it's already commented in string) and I'll try to think about fixing the test framework later

https://github.com/bazelbuild/intellij/blob/master/base/tests/utils/integration/com/google/idea/blaze/base/BlazeIntegrationTestCase.java#L110

[blorente]

That's fair, it's fine to leave the proper tests as a follow up. Do you think it would be hard to add a test that asserts that the section parses correctly? So a test that takes the string:

view_project_root: true

And asserts that the right Section is created.

[tpasternak]

Ok, that's easy, could you take a look again?

[blorente]

Yeah, looks good to me! Thanks for this change.