Update services client

NostrServices.Model/LinkPreviewData.cs

@@ -0,0 +1,29 @@
+using Newtonsoft.Json;
+using ProtoBuf;
+
+namespace NostrServices.Model;
+
+[ProtoContract]
+public class LinkPreviewData
+{
+    [ProtoMember(1)]
+    [JsonIgnore]
+    [System.Text.Json.Serialization.JsonIgnore]
+    public List<KeyValuePair<string, string>> OgTags { get; init; } = new();
+
+    [ProtoIgnore]
+    [JsonProperty("og_tags")]
+    public List<string[]> OgTagsJson => OgTags.Select(a => new[] {a.Key, a.Value}).ToList();
+
+    [ProtoMember(2)]
+    [JsonProperty("title")]
+    public string? Title { get; init; }
+
+    [ProtoMember(3)]
+    [JsonProperty("description")]
+    public string? Description { get; init; }
+
+    [ProtoMember(4)]
+    [JsonProperty("image")]
+    public string? Image { get; init; }
+}