Moving geolocation feature to ElasticPressLabs

[Rahmon]

Description of the Change

This change adds a new Feature that supports geolocation.

Ref: 10up/ElasticPress#2096

Alternate Designs

Benefits

Possible Drawbacks

Verification Process

1. In the Elasticpress dashboard, enable the feature Geolocation Search;
2. Set the "Location Me" selector field and check if you can see the button "Use My Location";
3. Create two meta fields for a post with the name latitude and longitude and set the values with your latitude and longitude.
4. Run an index;
5. On the site, click on the button "Use My Location";
6. Search for some term that appears in the post used in step 3 and the result should be only this post;
7. Click on "Stop using my location", search again using the same term and the result may include other posts;

Checklist:

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests passed.

Applicable Issues

Changelog Entry

Added new Feature that supports geolocation