Support properties and skipGeometry filters for single item queriess

[webb-ben]

Is your feature request related to a problem? Please describe.
The properties and skipGeometry filters are applied when querying /items but are ignored when retrieving a single item via the /items/{id} endpoint. Extending this functionality would improve consistency and efficiency when retrieving specific attributes for a single feature.

Describe the solution you'd like
I would like to be able to use pygeoapi to return minimal bytes possible when doing a transaction. Say I want to use the id of pygeoapi demo Lakes collections to resolve it's wikipedia url. The following query allows me to return only the pertinent information: https://demo.pygeoapi.io/master/collections/lakes/items?f=json&properties=name_alt&skipGeometry=true&id=0

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {
        "name_alt": "https://en.wikipedia.org/wiki/Lake_Baikal"
      },
      "geometry": null,
      "id": 0
    }
  ],
  "numberMatched": 1,
  "numberReturned": 1,
  "links": [...],
  "timeStamp": "2025-02-02T16:40:33.964949Z"
}

However, when making the same request for a single item, there is no way to minimize the size of the payload: https://demo.pygeoapi.io/master/collections/lakes/items/0?f=json&properties=name_alt&skipGeometry=true

{
  "type": "Feature",
  "properties": {
    "id": 0,
    "scalerank": 0,
    "name": "Lake Baikal",
    "name_alt": "https://en.wikipedia.org/wiki/Lake_Baikal",
    "admin": null,
    "featureclass": "Lake"
  },
  "geometry": {
    "type": "Polygon",
    "coordinates": [...]
  },
  "id": 0,
  "links": [...]
}

Describe alternatives you've considered
It is possible to configure geometry and properties via pygeoapi configuration, but I would like to make these values conditionally available.

Additional context
Naively you could implement the this within pygeoapi/api/itemtypes.py but that feels like an incorrect solution. A variety of providers have a flexible enough implementation of the select properties and skipGeometry options it might be easy to port the logic used in p.query(select_properties=[], skip_geometry=False): logic into p.get(identifier, select_properties=[], skip_geometry=False, **kwargs):