Add message editing command

Signed-off-by: Ske <voltasalt@gmail.com>

Myriad/Rest/DiscordApiClient.cs

@@ -121,6 +121,11 @@ namespace Myriad.Rest
             _client.PostMultipart<Message>($"/webhooks/{webhookId}/{webhookToken}?wait=true",
                 ("ExecuteWebhook", webhookId), request, files)!;
 
+        public Task<Message> EditWebhookMessage(ulong webhookId, string webhookToken, ulong messageId,
+                                                WebhookMessageEditRequest request) =>
+            _client.Patch<Message>($"/webhooks/{webhookId}/{webhookToken}/messages/{messageId}",
+                ("EditWebhookMessage", webhookId), request)!;
+
         public Task<Channel> CreateDm(ulong recipientId) =>
             _client.Post<Channel>($"/users/@me/channels", ("CreateDM", default), new CreateDmRequest(recipientId))!;
 

Myriad/Rest/Types/Requests/WebhookMessageEditRequest.cs

@@ -0,0 +1,15 @@
+using System.Text.Json.Serialization;
+
+using Myriad.Utils;
+
+namespace Myriad.Rest.Types.Requests
+{
+    public record WebhookMessageEditRequest
+    {
+        [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingDefault)]
+        public Optional<string?> Content { get; init; } 
+        
+        [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingDefault)]
+        public Optional<AllowedMentions> AllowedMentions { get; init; }
+    }
+}