[Feature] Components V2 (#3065)

* oh well. at least it runs

* well that's some breakings

* all the models (i think)

* barebones builder impl

* commit

* initial take on `WithX` component builder design

* actually usable stuff now

* few more changes

* fixes, changes, syntax sugar

* rework message flags + auto add `ComponentsV2`

* apparently it's also nullable

* fix build

* webhook component supports + builder validations + some xmldoc

* `ResolvedUnfurledMediaItem` + fix missing accessory on sections

* missing xmldoc

* fix modal + whatever change

* yeet unused dep

src/Discord.Net.Rest/API/Rest/ModifyMessageParams.cs

@@ -1,19 +1,21 @@
 using Newtonsoft.Json;
 
-namespace Discord.API.Rest
+namespace Discord.API.Rest;
+
+internal class ModifyMessageParams
 {
-    [JsonObject(MemberSerialization = MemberSerialization.OptIn)]
-    internal class ModifyMessageParams
-    {
-        [JsonProperty("content")]
-        public Optional<string> Content { get; set; }
-        [JsonProperty("embeds")]
-        public Optional<API.Embed[]> Embeds { get; set; }
-        [JsonProperty("components")]
-        public Optional<API.ActionRowComponent[]> Components { get; set; }
-        [JsonProperty("flags")]
-        public Optional<MessageFlags?> Flags { get; set; }
-        [JsonProperty("allowed_mentions")]
-        public Optional<AllowedMentions> AllowedMentions { get; set; }
-    }
+    [JsonProperty("content")]
+    public Optional<string> Content { get; set; }
+
+    [JsonProperty("embeds")]
+    public Optional<Embed[]> Embeds { get; set; }
+
+    [JsonProperty("components")]
+    public Optional<IMessageComponent[]> Components { get; set; }
+
+    [JsonProperty("flags")]
+    public Optional<MessageFlags?> Flags { get; set; }
+
+    [JsonProperty("allowed_mentions")]
+    public Optional<AllowedMentions> AllowedMentions { get; set; }
 }