docs(*): add links to Discord's API objects & data (#5862)

src/structures/GuildMember.js

@@ -15,7 +15,7 @@ let Structures;
 class GuildMember extends Base {
   /**
    * @param {Client} client The instantiating client
-   * @param {Object} data The data for the guild member
+   * @param {APIGuildMember} data The data for the guild member
    * @param {Guild} guild The guild the member is part of
    */
   constructor(client, data, guild) {
@@ -397,3 +397,8 @@ class GuildMember extends Base {
 TextBasedChannel.applyToClass(GuildMember);
 
 module.exports = GuildMember;
+
+/**
+ * @external APIGuildMember
+ * @see {@link https://discord.com/developers/docs/resources/guild#guild-member-object}
+ */