Relay custom votes to a webhook (#18561)

Co-authored-by: DrSmugleaf <DrSmugleaf@users.noreply.github.com>
Co-authored-by: DrSmugleaf <drsmugleaf@gmail.com>

Content.Server/Discord/WebhookEmbedField.cs

@@ -0,0 +1,20 @@
+using System.Text.Json.Serialization;
+
+namespace Content.Server.Discord;
+
+// https://discord.com/developers/docs/resources/channel#embed-object-embed-field-structure
+public struct WebhookEmbedField
+{
+    [JsonPropertyName("name")]
+    public string Name { get; set; } = "";
+
+    [JsonPropertyName("value")]
+    public string Value { get; set; } = "";
+
+    [JsonPropertyName("inline")]
+    public bool Inline { get; set; } = true;
+
+    public WebhookEmbedField()
+    {
+    }
+}