[Feature] Add new discord stuff (#2501)

* changesss

- Added missing error code
- Moved region a bit
- Add new `guild feature`
- Add new `NitroBasic` subscription plan

* fix sending message in rest text-in-voice channels

src/Discord.Net.Core/DiscordErrorCode.cs

@@ -116,15 +116,15 @@ namespace Discord
         TargetUserNotInVoice = 40032,
         MessageAlreadyCrossposted = 40033,
         ApplicationNameAlreadyExists = 40041,
-        #endregion
-
-        #region Action Preconditions/Checks (50XXX)
         ApplicationInteractionFailedToSend = 40043,
         CannotSendAMessageInAForumChannel = 40058,
         ThereAreNoTagsAvailableThatCanBeSetByNonModerators = 40066,
         ATagIsRequiredToCreateAForumPostInThisChannel = 40067,
         InteractionHasAlreadyBeenAcknowledged = 40060,
         TagNamesMustBeUnique = 40061,
+        #endregion
+
+        #region Action Preconditions/Checks (50XXX)
         MissingPermissions = 50001,
         InvalidAccountType = 50002,
         CannotExecuteForDM = 50003,
@@ -154,6 +154,7 @@ namespace Discord
         BulkDeleteMessageTooOld = 50034,
         InvalidFormBody = 50035,
         InviteAcceptedForGuildThatBotIsntIn = 50036,
+        InvalidActivityAction = 50039,
         InvalidAPIVersion = 50041,
         FileUploadTooBig = 50045,
         InvalidFileUpload = 50046,
@@ -161,6 +162,7 @@ namespace Discord
         InvalidGuild = 50055,
         InvalidMessageType = 50068,
         PaymentSourceRequiredForGift = 50070,
+        CannotModifySystemWebhook = 50073,
         CannotDeleteRequiredCommunityChannel = 50074,
         CannotEditStickersWithinAMessage = 50080,
         InvalidSticker = 50081,

src/Discord.Net.Core/Entities/Guilds/GuildFeature.cs

@@ -181,5 +181,9 @@ namespace Discord
         ///     The guild has enabled the welcome screen.
         /// </summary>
         WelcomeScreenEnabled = 1L << 41,
+        /// <summary>
+        ///     The guild has been set as a support server on the App Directory.
+        /// </summary>
+        DeveloperSupportServer = 1L << 42,
     }
 }

src/Discord.Net.Core/Entities/Users/PremiumType.cs

@@ -16,6 +16,11 @@ namespace Discord
         /// <summary>
         ///     Nitro subscription. Includes app perks as well as the games subscription service.
         /// </summary>
-        Nitro = 2
+        Nitro = 2,
+
+        /// <summary>
+        ///     Nitro Basic subscription. Includes app perks like video backgrounds, sending bigger files.
+        /// </summary>
+        NitroBasic = 3
     }
 }

src/Discord.Net.Rest/Entities/Channels/RestVoiceChannel.cs

@@ -19,8 +19,7 @@ namespace Discord.Rest
         /// <summary>
         ///     Gets whether or not the guild has Text-In-Voice enabled and the voice channel is a TiV channel.
         /// </summary>
-        public virtual bool IsTextInVoice
+        public virtual bool IsTextInVoice => true;
-            => Guild.Features.HasTextInVoice;
         /// <inheritdoc />
         public int Bitrate { get; private set; }
         /// <inheritdoc />