[LLC, Persistence] Add doc comments

Signed-off-by: Sahil Kumar <[email protected]>

packages/stream_chat_persistence/lib/src/entity/messages.dart

@@ -3,50 +3,72 @@ import 'package:stream_chat_persistence/src/converter/list_converter.dart';
 import 'package:stream_chat_persistence/src/converter/map_converter.dart';
 import 'package:stream_chat_persistence/src/converter/message_sending_status_converter.dart';
 
+/// Represents a [Messages] table in [MoorChatDatabase].
 @DataClassName('MessageEntity')
 class Messages extends Table {
+  /// The message id
   TextColumn get id => text()();
 
+  /// The text of this message
   TextColumn get messageText => text().nullable()();
 
+  /// The list of attachments, either provided by the user
+  /// or generated from a command or as a result of URL scraping.
   TextColumn get attachments =>
       text().nullable().map(ListConverter<String>())();
 
+  /// The status of a sending message
   IntColumn get status =>
       integer().nullable().map(MessageSendingStatusConverter())();
 
+  /// The message type
   TextColumn get type => text().nullable()();
 
+  /// The list of user mentioned in the message
   TextColumn get mentionedUsers =>
       text().nullable().map(ListConverter<String>())();
 
+  /// A map describing the count of number of every reaction
   TextColumn get reactionCounts => text().nullable().map(MapConverter<int>())();
 
+  /// A map describing the count of score of every reaction
   TextColumn get reactionScores => text().nullable().map(MapConverter<int>())();
 
+  /// The ID of the parent message, if the message is a thread reply.
   TextColumn get parentId => text().nullable()();
 
+  /// The ID of the quoted message, if the message is a quoted reply.
   TextColumn get quotedMessageId => text().nullable()();
 
+  /// Number of replies for this message.
   IntColumn get replyCount => integer().nullable()();
 
+  /// Check if this message needs to show in the channel.
   BoolColumn get showInChannel => boolean().nullable()();
 
+  /// If true the message is shadowed
   BoolColumn get shadowed => boolean().nullable()();
 
+  /// A used command name.
   TextColumn get command => text().nullable()();
 
+  /// The DateTime when the message was created.
   DateTimeColumn get createdAt => dateTime()();
 
+  /// The DateTime when the message was updated last time.
   DateTimeColumn get updatedAt => dateTime().nullable()();
 
+  /// The DateTime when the message was deleted.
   DateTimeColumn get deletedAt => dateTime().nullable()();
 
+  /// Id of the User who sent the message
   TextColumn get userId => text().nullable()();
 
+  /// The channel cid of which this message is part of
   TextColumn get channelCid => text().nullable().customConstraint(
       'NULLABLE REFERENCES channels(cid) ON DELETE CASCADE')();
 
+  /// Message custom extraData
   TextColumn get extraData => text().nullable().map(MapConverter<Object>())();
 
   @override