feat: api v9 and threads (#5570)

Co-authored-by: Noel <icrawltogo@gmail.com>
Co-authored-by: Amish Shah <dev@shah.gg>
Co-authored-by: Vlad Frangu <kingdgrizzle@gmail.com>
Co-authored-by: SynthGhost <60333233+synthghost@users.noreply.github.com>
Co-authored-by: SpaceEEC <24881032+SpaceEEC@users.noreply.github.com>
Co-authored-by: Elliot <elliot@maisl.fr>
Co-authored-by: Antonio Román <kyradiscord@gmail.com>
Co-authored-by: Sugden <28943913+NotSugden@users.noreply.github.com>

src/util/ThreadMemberFlags.js

@@ -0,0 +1,30 @@
+'use strict';
+
+const BitField = require('./BitField');
+
+/**
+ * Data structure that makes it easy to interact with a {@link ThreadMember#flags} bitfield.
+ * @extends {BitField}
+ */
+class ThreadMemberFlags extends BitField {}
+
+/**
+ * @name ThreadMemberFlags
+ * @kind constructor
+ * @memberof ThreadMemberFlags
+ * @param {BitFieldResolvable} [bits=0] Bit(s) to read from
+ */
+
+/**
+ * Bitfield of the packed bits
+ * @type {number}
+ * @name ThreadMemberFlags#bitfield
+ */
+
+/**
+ * Numeric thread member flags. There are currently no bitflags relevant to bots for this.
+ * @type {Object<string, number>}
+ */
+ThreadMemberFlags.FLAGS = {};
+
+module.exports = ThreadMemberFlags;