test(tree): use golden file to preserve ANSI sequences

[bashbunni]

This might be a "fix" rather than "test" conventional commit, but this fixes a test that is broken on master. Not sure if/how this ever passed since it was giving a styled output despite the want value not being styled. This change uses a golden file to track the style changes (resulting ANSI sequences) in the test output.

Didn't work on v1.0.0 either 🤷

[bashbunni]

Oh right, it's because the terminal used for GitHub actions doesn't have colour capability, so the test was passing with GitHub actions and failing locally... Now this fails CI 😂 We can either add lipgloss.SetColorProfile(termenv.TrueColor) at the beginning of this test to force coloured output in GH actions or not use a golden file and compare want to ansi.Strip(table.String()) and ignore the colours in the test

Edit: in v2 we won't need to force colorprofile in the tests