[Docs] Import Existing Meshery Designs into Meshery

#### Current State

There is currently no documentation on the Layer5 site for importing existing meshery designs into Meshery.

#### Desired State

A new guide is needed, following a similar format to the existing [Starting Helm](https://docs.layer5.io/meshmap/getting-started/starting-helm/) documentation.

The new documentation on importing Docker Compose files into Meshery will cover both methods: using the **Meshery CLI** and the **Meshery UI**. It will follow the structure and style seen in the [Importing Designs](https://docs.meshery.io/guides/configuration-management/importing-designs)

This tutorial will also be included in [Meshery Docs](https://docs.meshery.io/guides/configuration-management/importing-designs) replacing the Meshery Designs link there.

---

#### Contributor Guide and Resources
- 📚 [Instructions for contributing to documentation](https://github.com/layer5io/docs/blob/master/CONTRIBUTING.md)
- Layer5 documentation [site](https://docs.layer5.io) and [source](https://github.com/layer5io/docs/)
- 🎨 Wireframes and [designs for Layer5 site](https://www.figma.com/file/5ZwEkSJwUPitURD59YHMEN/Layer5-Designs) in Figma [(open invite)](https://www.figma.com/team_invite/redeem/qJy1c95qirjgWQODApilR9)
- 🙋🏾🙋🏼 Questions: [Layer5 Discussion Forum](https://discuss.layer5.io) and [Layer5 Community Slack](http://slack.layer5.io)