fix: JSON Schema missing title in subschemas

[dblanchette]

The name attribute of Schema is used for the JSON Schema's title attribute, but it does not work on schemas used as reference or used as elements of Or, And , etc.

Example:

Schema(
    {
        "test": Or(
            Schema(
                "option1", name="Option 1", description="This is the first option"
            ),
            Schema(
                "option2",
                name="Option 2",
                description="This is the second option",
            ),
        )
    }
)

Before:

{
      "$schema": "http://json-schema.org/draft-07/schema#",
      "$id": "my-id",
      "properties": {
          "test": {
              "anyOf": [
                  {
                      "const": "option1",
                      "description": "This is the first option",
                  },
                  {
                      "const": "option2",
                      "description": "This is the second option",
                  },
              ]
          }
      },
      "required": ["test"],
      "additionalProperties": false,
      "type": "object",
  }

After:

{
      "$schema": "http://json-schema.org/draft-07/schema#",
      "$id": "my-id",
      "properties": {
          "test": {
              "anyOf": [
                  {
                      "const": "option1",
                      "title": "Option 1",
                      "description": "This is the first option",
                  },
                  {
                      "const": "option2",
                      "title": "Option 2",
                      "description": "This is the second option",
                  },
              ]
          }
      },
      "required": ["test"],
      "additionalProperties": false,
      "type": "object",
  }