update openapi response to add html parameters

[vincentsarago]

closes #3

intercept openapi response from stac-fastapi and update the query-parameters and accepted headers

# before
curl http://127.0.0.1:8000/api | jq '.paths."/"'
{
  "get": {
    "summary": "Landing Page",
    "description": "Endpoint.",
    "operationId": "Landing_Page__get",
    "responses": {
      "200": {
        "description": "Successful Response",
        "content": {
          "application/json": {
            "schema": {
              "$ref": "#/components/schemas/LandingPage"
            }
          }
        }
      }
    }
  }
}


# now
curl http://127.0.0.1:8000/api | jq '.paths."/"'
{
  "get": {
    "summary": "Landing Page",
    "description": "Endpoint.",
    "operationId": "Landing_Page__get",
    "responses": {
      "200": {
        "description": "Successful Response",
        "content": {
          "application/json": {
            "schema": {
              "$ref": "#/components/schemas/LandingPage"
            }
          },
          "text/html": {}
        }
      }
    },
    "parameters": [
      {
        "name": "f",
        "in": "query",
        "required": false,
        "schema": {
          "anyOf": [
            {
              "enum": [
                "html"
              ],
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "description": "Response MediaType.",
          "title": "F"
        },
        "description": "Response MediaType."
      }
    ]
  }
}

[vincentsarago]

openapi will use camel case for the summary, so by using lower case we make sure the name can match the one provided in endpoint_names