Usync: Barebones Usync Protocol support (#960)

* feature(feature/usync-mex): initial commit

* chore: fix merge commit

* chore:lint

src/Types/USync.ts

@@ -0,0 +1,27 @@
+import { BinaryNode } from '../WABinary'
+import { USyncUser } from '../WAUSync'
+
+/**
+ * Defines the interface for a USyncQuery protocol
+ */
+export interface USyncQueryProtocol {
+    /**
+     * The name of the protocol
+     */
+    name: string
+    /**
+     * Defines what goes inside the query part of a USyncQuery
+     */
+    getQueryElement: () => BinaryNode
+    /**
+     * Defines what goes inside the user part of a USyncQuery
+     */
+    getUserElement: (user: USyncUser) => BinaryNode | null
+
+    /**
+     * Parse the result of the query
+     * @param data Data from the result
+     * @returns Whatever the protocol is supposed to return
+     */
+    parser: (data: BinaryNode) => unknown
+}