Add POST API endpoint support for uploading Nests and Eggs programmatically

[omarikr]

There should be functionality to POST to the nests endpoint so that nests and eggs can be added programmatically rather than manually one at a time.

API adjusted so it is possible to bulk import multiple egg json's and create or place them in existing nests. Users could write their own script or use a prepackaged solution to ingest a list of eggs to a nest.

We all know it is a PITA to manually import each egg and create Nest manually.