The first Cypress integration test

Should be able to:
* Open the map
* Mock the tile server layer (png and urfGrid)
* Being able to zoom in by clicking a cluster icon.

---

Some hints:

- Please read our [readme](https://github.com/Greenstand/treetracker-web-map-core#treetracker-web-map-core) for more information/guide/tutorial.
- Here is [an engineering book](https://greenstand.gitbook.io/engineering/) in Greenstand.
- To know more about our organization, visit our [website](https://greenstand.org).
- If you want to join the slack community (some resources need the community member's permission), please leave your email address.

Read the repository README for the map guide and tutorial, then locate the Cypress integration-test entry point and the map entry point. Cover opening the map, mocking the png and utfGrid tile layers, and zooming through a cluster icon; done means these scenarios pass.

Written by the indexing model from the issue text.