Support one-time snapshot with MeshSync data written to local file.

[leecalcote]

Current Behavior
MeshSync writes its output to Meshery Broker (NATS).

Desired Behavior
See https://github.com/meshery/kubectl-meshsync-snapshot.

Contributor Resources

The meshery.io website uses Jekyll and GitHub Pages. Site content is found under the master branch.

• See the Contributing to Meshery.io Website section of the readme.md and other contributing instructions, too.
• See Meshery site designs in Figma (open invite).
• Fill-in a Community Member Form and join the Community Slack for access.

[stale]

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