Add Quest.GetCommunityItemDefinitions

[Flo4604]

Is your feature request related to a problem? Please describe.

I would like to use client._sendUnified('Quest.GetCommunityItemDefinitions#1'); which is currently not possible, thus I've added a PR which makes it possible. This protobuf is used to get information about a certain appId.

Here a example response:

{
  item_definitions: [
    {
      item_type: 1,
      appid: 730,
      item_name: '',
      item_title: '',
      item_description: '',
      item_image_small: '',
      item_image_large: '',
      item_key_values: '""\n' +
        '{\n' +
        '\t"level_images"\n' +
        '\t{\n' +
        '\t\t"1"\t\t"54e40b9e2288fbab8bd4c6537b0325d405c7e1b0.png"\n' +
        '\t\t"2"\t\t"01ee9c21ab01c4eb62e577f10cf9efd2a56da771.png"\n' +
        '\t\t"3"\t\t"080eb160e052b2b1524829a129c3b3f9a18c90a4.png"\n' +
        '\t\t"4"\t\t"622edeb2f8fcf0798a9993feb61aeaf9ccdfc5ea.png"\n' +
        '\t\t"5"\t\t"400f2cdf69db174f5616038edbb7a3f8e917ae00.png"\n' +
        '\t\t"foil"\t\t"8203d824739e19c69aa4e33d761ce53a16159d19.png"\n' +
        '\t}\n' +
        '\t"level_names"\n' +
        '\t{\n' +
        '\t\t"1"\t\t"Chicken Chaser"\n' +
        '\t\t"2"\t\t"Brass Recruit"\n' +
        '\t\t"3"\t\t"Dusty Veteran"\n' +
        '\t\t"4"\t\t"Guardian Angel"\n' +
        '\t\t"5"\t\t"Global Sentinel"\n' +
        '\t\t"foil"\t\t"Elite Crewman"\n' +
        '\t}\n' +
        '}\n',
      item_series: 1,
      item_class: 1,
      editor_accountid: null,
      active: true,
      item_image_composed: null,
      item_image_composed_foil: null,
      deleted: null,
      item_last_changed: 1624547670,
      broadcast_channel_id: null,
      item_movie_webm: '',
      item_movie_mp4: '',
      item_movie_webm_small: '',
      item_movie_mp4_small: ''
    }
  ]
}

#418