Vote type delay, code comments.

Added doc comments to server side voting API.
There is now a 4 minute delay between creating votes of the same type.
Shuffled some code around.
Made a StandardVoteType enum instead of string IDs.

Content.Shared/Voting/StandardVoteType.cs

@@ -0,0 +1,18 @@
+namespace Content.Shared.Voting
+{
+    /// <summary>
+    /// Standard vote types that players can initiate themselves from the escape menu.
+    /// </summary>
+    public enum StandardVoteType : byte
+    {
+        /// <summary>
+        /// Vote to restart the round.
+        /// </summary>
+        Restart,
+
+        /// <summary>
+        /// Vote to change the game preset for next round.
+        /// </summary>
+        Preset
+    }
+}