Add tests and functionality for handling double quotes in file names in FileTree

[iskandersierra]

Description

• Closes Allow quoted file names in FileTree #2608
• What does this PR change?
  Allows to use double quotes in FileTree component to indicate the full file name in cases where the file name contains white space. Like: - "my file name" this is the comment
• Did you change something visual?
  Yes, but I don't know how to test the visuals from this project. I just added some tests for this case and change the code parsing the content of the list.
  I would still need to update the docs

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[iskandersierra]

I might need to consider detecting the special double-quotes “ and ” because the markdown is turning the regular double quotes into those.

[iskandersierra]

It is working when the comments contain some nodes, but not when the comments are plain text

[iskandersierra]

I think there is no need to implement this feature as proposed. There is already away to create a file name with spaces, if we use a tag like <span> to enclose the file name.

Maybe the only required change is in the docs to indicate that fact, but there is no need to complicate things with using quotes because they introduce too many cases when combined with markup tags.