Added Overloads for the EmbedBuilder Ctor

Changes:
Made it so that EmbedFieldBuilders can be passed to an EmbedBuilder
Made is so that EmbedAuthorBuilder, EmbedFootBuilder and EmbedFieldBuilders can be passed to an EmbedBuilder

Should have no breaking changes

src/Discord.Net.Core/Entities/Messages/EmbedBuilder.cs

@@ -24,6 +24,26 @@ namespace Discord
             Fields = new List<EmbedFieldBuilder>();
         }
 
+        public EmbedBuilder(params EmbedFieldBuilder[] EmbedFields)
+        {
+            Fields = new List<EmbedFieldBuilder>();
+            foreach (var Field in EmbedFields)
+            {
+                Fields.Add(Field);
+            }
+        }
+
+        public EmbedBuilder(EmbedAuthorBuilder Author, EmbedFooterBuilder Footer, params EmbedFieldBuilder[] EmbedFields)
+        {
+            this.Author = Author;
+            this.Footer = Footer;
+            Fields = new List<EmbedFieldBuilder>();
+            foreach (var Field in EmbedFields)
+            {
+                Fields.Add(Field);
+            }
+        }
+
         public string Title
         {
             get => _title;