doc: Add windows example for Path.format

[mithun-daa]

Pull Request check-list

Please make sure to review and check all of these items:

• Does make -j8 test (UNIX) or vcbuild test nosign (Windows) pass with
  this change (including linting)?
• Is the commit message formatted according to CONTRIBUTING.md?
• If this change fixes a bug (or a performance problem), is a regression
  test (or a benchmark) included?
• Is a documentation update included (if this change modifies
  existing APIs, or introduces new ones)?

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Description of change

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Add windows sample for Path.format as requested in Issue #5671

[mithun-daa]

FYI: The path is not formatted if the dir or base are not provided. Hence skipped the second example:

// `root` will be used if `dir` is not specified and `name` + `ext` will be used
// if `base` is not specified
path.format({
    root : "/",
    ext : ".txt",
    name : "file"
})
// returns
'/file.txt'

[jasnell]

Minor nit... rather than \*nix:, perhaps just say An example on Posix systems:

[jasnell]

LGTM with a nit

[mithun-daa]

Updated with the requested changes.

[jasnell]

LGTM

[thefourtheye]

LGTM

[mscdex]

This line should probably also be commented or moved to the end of the previous line.

[mithun-daa]

Sorry, I did not follow you @mscdex . Did you mean comment out the return value?

[Trott]

@mscdex How it is done here is how it is for the other examples in the doc. This is unfortunate in my opinion and I opened a pull request to change it, but the reviews have been mixed. I invite you to comment at #5670

[mithun-daa]

@Trott did you want me to make the changes as mentioned in #5670 in this PR?

[Trott]

@mithun-daa I would say no, or at least not until #5670 lands. It might now land. I think what you've done here is fine.

[benjamingr]

It landed now, so I think it's best to update this PR to use the newer style.

[mithun-daa]

Pushed the requested changes.

[jasnell]

Landed in 54e6a8d
commits squashed when landed.

[mithun-daa]

@jasnell Noob question - what do you mean by commits squashed?

[jasnell]

@mithun-daa ... the pull request contains 3 commits, I merged them into 1

[mithun-daa]

Thanks for clearing that up @jasnell

[benjamingr]

Thanks for stepping up @Mithun-data hope to see you more around :)

[mithun-daa]

Anytime @benjamingr - hope I can contribute more and hopefully more meaningful stuff.