tools/lsp: lazy load <leader> c l keybind

Fixes a issue where folks would try to rebind <leader> c, only to get a
non-prefix key error about <leader> c l.

modules/config/default/autoload/deferred.el

@@ -0,0 +1,20 @@
+;;; config/default/autoload/deferred.el -*- lexical-binding: t; -*-
+
+;; TODO generalize this
+;;;###autoload
+(defun +default/lsp-command-map ()
+  "Lazily invoke `lsp-command-map'."
+  (interactive)
+  (require 'lsp-mode)
+  (map! :leader "c l" lsp-command-map)
+  (dolist (leader-key (list doom-leader-key doom-leader-alt-key))
+    (let ((lsp-keymap-prefix (concat leader-key " c l")))
+      (lsp-enable-which-key-integration)))
+  (setq prefix-arg current-prefix-arg
+        unread-command-events
+        (mapcar (lambda (e) (cons t e))
+                (vconcat (when evil-this-operator
+                           (where-is-internal evil-this-operator
+                                              evil-normal-state-map
+                                              t))
+                         (this-command-keys)))))