Implement API: GET /gis/location/nearest

To implement an endpoint:

https://github.com/Greenstand/treetracker-query-api/blob/1c7c606c3fd18554b3163fac29ad147ff3b43702/docs/api/spec/query-api.yaml#L549-L577

• Please write an e2e test to cover it.
• Please follow the guide in the 'readme' to follow our architecture on the server-side.

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Some hints:

• Please read our readme for more information/guide/tutorial.
• Here is an engineering book in Greenstand.
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