Update metadata and example

[imba-tjd]

Summary:

• Add dev_langs to metadata
• Move snippets to file

Questions:

1. These files contain quotation mark in metadata while some others not. Shall I remove them?
2. ms.topic: article seems to be replaced by ms.topic: conceptual.

If so, docs/styleguide/template.md also needs minor updating.

[rpetrusha]

Closing and reopening to begin new build.

[mairaw]

You're right @imba-tjd. I'll review the topics that are still using ms.topic article to remove them all in a separate PR.

[BillWagner]

@mairaw Can you look at this one? The conflicts are all in the metadata section, and it looks like the PR may have been caught in the recent changes you were making across many topics.

[mairaw]

@BillWagner yes they did. It should be fixed now.

[mairaw]

@meganbradley because I merged the master branch to this PR, the commit validation report is showing things that are not applicable to the PR itself.

[mairaw]

Thank you @imba-tjd for your contribution. Your changes should show up live within a day or so.