Update to use template files

[johlju]

Pull Request (PR) description

• Update appveyor.yml to use the default template.
• Added default template files .codecov.yml, .gitattributes, and .gitignore, and .vscode folder.

This Pull Request (PR) fixes the following issues

Task list

• [x] Added an entry under the Unreleased section of the change log in the README.md. Entry should say what was changed, and how that affects users (if applicable).
• [ ] Resource documentation added/updated in README.md.
• [ ] Resource parameter descriptions added/updated in README.md, schema.mof and comment-based help.
• [ ] Comment-based help added/updated.
• [ ] Localization strings added/updated in all localization files as appropriate.
• [ ] Examples appropriately added/updated.
• [ ] Unit tests added/updated. See DSC Resource Testing Guidelines.
• [ ] Integration tests added/updated (where possible). See DSC Resource Testing Guidelines.
• [ ] New/changed code adheres to DSC Resource Style Guidelines and Best Practices.

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This change is 

[codecov-io]

Codecov Report

:exclamation: No coverage uploaded for pull request base (dev@a953945). Click here to learn what that means. The diff coverage is n/a.

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  Files          ?      10           
  Lines          ?     701           
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  Hits           ?       9           
  Misses         ?     692           
  Partials       ?       0

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