feat(Role): add flags (#9694)

Co-authored-by: n1ck_pro <59617443+N1ckPro@users.noreply.github.com>

src/util/RoleFlags.js

@@ -0,0 +1,37 @@
+'use strict';
+
+const BitField = require('./BitField');
+
+/**
+ * Data structure that makes it easy to interact with an {@link GuildMember#flags} bitfield.
+ * @extends {BitField}
+ */
+class RoleFlags extends BitField {}
+
+/**
+ * @name RoleFlags
+ * @kind constructor
+ * @memberof RoleFlags
+ * @param {BitFieldResolvable} [bits=0] Bit(s) to read from
+ */
+
+/**
+ * Numeric guild member flags. All available properties:
+ * * `IN_PROMPT`
+ * @type {Object}
+ * @see {@link https://discord.com/developers/docs/topics/permissions#role-object-role-flags}
+ */
+RoleFlags.FLAGS = {
+  IN_PROMPT: 1 << 0,
+};
+
+/**
+ * Data that can be resolved to give a role flag bitfield. This can be:
+ * * A string (see {@link RoleFlags.FLAGS})
+ * * A role flag
+ * * An instance of RoleFlags
+ * * An Array of RoleFlagsResolvable
+ * @typedef {string|number|RoleFlags|RoleFlagsResolvable[]} RoleFlagsResolvable
+ */
+
+module.exports = RoleFlags;