docs: add deprecation warnings

Author: Syjalo

packages/discord.js/src/structures/ApplicationCommand.js

@@ -145,6 +145,7 @@ class ApplicationCommand extends Base {
        * Whether the command can be used in DMs
        * <info>This property is always `null` on guild commands</info>
        * @type {?boolean}
+       * @deprecated Use {@link ApplicationCommand#contexts} instead.
        */
       this.dmPermission = data.dm_permission;
     } else {

packages/discord.js/src/structures/Message.js

@@ -420,6 +420,7 @@ class Message extends Base {
      * @property {string} commandName The name of the interaction's application command,
      * as well as the subcommand and subcommand group, where applicable
      * @property {User} user The user that invoked the interaction
+     * @deprecated Use {@link Message#interactionMetadata} instead.
      */
 
     if (data.interaction) {

packages/discord.js/typings/index.d.ts

@@ -445,6 +445,7 @@ export class ApplicationCommand<PermissionsFetchType = {}> extends Base {
   public description: string;
   public descriptionLocalizations: LocalizationMap | null;
   public descriptionLocalized: string | null;
+  /** @deprecated Use {@link ApplicationCommand.contexts} instead */
   public dmPermission: boolean | null;
   public guild: Guild | null;
   public guildId: Snowflake | null;
@@ -2100,6 +2101,7 @@ export class Message<InGuild extends boolean = boolean> extends Base {
   public get guild(): If<InGuild, Guild>;
   public get hasThread(): boolean;
   public id: Snowflake;
+  /** @deprecated Use {@link Message.interactionMetadata} instead */
   public interaction: MessageInteraction | null;
   public interactionMetadata: MessageInteractionMetadata | null;
   public get member(): GuildMember | null;