module: add :tools collab

Add a collaborative editing module, powered by crdt.el.

Ref: https://code.librehq.com/qhong/crdt.el
Co-authored-by: Arte Ebrahimi <arteebrahimi@gmail.com>

modules/tools/collab/config.el

@@ -0,0 +1,8 @@
+;;; tools/collab/config.el -*- lexical-binding: t; -*-
+
+(use-package! crdt
+  :commands (crdt-share-buffer crdt-connect)
+  :init
+  (when (featurep! +tunnel)
+    (setq crdt-use-tuntox t)
+    (setq crdt-tuntox-password-in-url t)))