Update geo_point docs for geo_shape queries (#57487)

This commit highlights the ability for geo_point fields to be
used in geo_shape queries. It also adds an explicit geo_point
example in the geo_shape query documentation

Closes #56927.

Author: talevy

docs/reference/mapping/types/geo-point.asciidoc

@@ -8,7 +8,7 @@ Fields of type `geo_point` accept latitude-longitude pairs, which can be used:
 
 * to find geo-points within a <<query-dsl-geo-bounding-box-query,bounding box>>,
   within a certain <<query-dsl-geo-distance-query,distance>> of a central point,
-  or within a <<query-dsl-geo-polygon-query,polygon>>.
+  or within a <<query-dsl-geo-polygon-query,polygon>> or within a <<query-dsl-geo-shape-query,geo_shape query>>.
 * to aggregate documents <<search-aggregations-bucket-geohashgrid-aggregation,geographically>>
   or by <<search-aggregations-bucket-geodistance-aggregation,distance>> from a central point.
 * to integrate distance into a document's <<query-dsl-function-score-query,relevance score>>.

docs/reference/query-dsl/geo-shape-query.asciidoc

@@ -23,7 +23,7 @@ examples.
 Similar to the `geo_shape` type, the `geo_shape` query uses
 http://www.geojson.org[GeoJSON] to represent shapes.
 
-Given the following index:
+Given the following index with locations as `geo_shape` fields:
 
 [source,console]
 --------------------------------------------------
@@ -77,6 +77,90 @@ GET /example/_search
 }
 --------------------------------------------------
 
+The above query can, similarly, be queried on `geo_point` fields.
+
+[source,console]
+--------------------------------------------------
+PUT /example_points
+{
+    "mappings": {
+        "properties": {
+            "location": {
+                "type": "geo_point"
+            }
+        }
+    }
+}
+
+PUT /example_points/_doc/1?refresh
+{
+    "name": "Wind & Wetter, Berlin, Germany",
+    "location": [13.400544, 52.530286]
+}
+--------------------------------------------------
+// TEST[continued]
+
+Using the same query, the documents with matching `geo_point` fields are returned
+
+[source,console]
+--------------------------------------------------
+GET /example_points/_search
+{
+    "query":{
+        "bool": {
+            "must": {
+                "match_all": {}
+            },
+            "filter": {
+                "geo_shape": {
+                    "location": {
+                        "shape": {
+                            "type": "envelope",
+                            "coordinates" : [[13.0, 53.0], [14.0, 52.0]]
+                        },
+                        "relation": "intersects"
+                    }
+                }
+            }
+        }
+    }
+}
+--------------------------------------------------
+// TEST[continued]
+
+[source,console-result]
+--------------------------------------------------
+{
+  "took" : 17,
+  "timed_out" : false,
+  "_shards" : {
+    "total" : 1,
+    "successful" : 1,
+    "skipped" : 0,
+    "failed" : 0
+  },
+  "hits" : {
+    "total" : {
+      "value" : 1,
+      "relation" : "eq"
+    },
+    "max_score" : 1.0,
+    "hits" : [
+      {
+        "_index" : "example_points",
+        "_id" : "1",
+        "_score" : 1.0,
+        "_source" : {
+          "name": "Wind & Wetter, Berlin, Germany",
+          "location": [13.400544, 52.530286]
+        }
+      }
+    ]
+  }
+}
+--------------------------------------------------
+// TESTRESPONSE[s/"took" : 17/"took" : $body.took/]
+
 ==== Pre-Indexed Shape
 
 The Query also supports using a shape which has already been indexed in