Update README with sort functions

README.org

@@ -20,7 +20,7 @@ This package provides an interface to easily query and display results from your
 
 * Screen-shots
 
-You can query org-roam with ~org-roam-ql-search~. The results are displayed in an org-roam-like buffer. org-roam-ql also comes with a transient that can be used to modify the results viewed. The transient can be activated with ~v~. You can modify the title (~t~), query (~q~) and specify if the query is a subquery (apply query on the results of the buffer) or query against the whole org-roam database (~i~). Refreshing the buffer (~r~) will display the updated results.
+You can query org-roam with ~org-roam-ql-search~. The results are displayed in an org-roam-like buffer. org-roam-ql also comes with a transient that can be used to modify the results viewed. The transient can be activated with ~v~. You can modify the title (~t~), query (~q~), sort (~s~) and specify if the query is a subquery (apply query on the results of the buffer) or query against the whole org-roam database (~i~). Refreshing the buffer (~r~) will display the updated results.
 
 [[images/demo4.gif]]
 
@@ -54,7 +54,7 @@ Example configuration:
 
 * Usage
 ** Commands/functions
-- =org-roam-ql-search (SOURCE-OR-QUERY &optional TITLE)= :: This is an *interactive* command that creates a ~org-roam-ql~ buffer with the nodes of the corresponding [[#valid-values-for-source-or-query][ ~SOURCE-OR-QUERY~ ]] ([[#valid-values-for-source-or-query] with ~TITLE~. An ~org-roam-ql~ buffer is functionally similar to the ~org-roam-buffer~, but allows displaying any list of nodes ([[#screen-shots][see screen-shots above]]). When called interactively, it will prompt for the ~SOURCE-OR-QUERY~ and ~TITLE~. Note that when entering queries interactively either in ~org-roam-ql-search~ or in the transient, you can get completion-at-point with ~tab~.
+- =org-roam-ql-search (SOURCE-OR-QUERY &optional TITLE SORT-FN)= :: This is an *interactive* command that creates a ~org-roam-ql~ buffer with the nodes of the corresponding [[#valid-values-for-source-or-query][ ~SOURCE-OR-QUERY~ ]] ([[#valid-values-for-source-or-query] with ~TITLE~. An ~org-roam-ql~ buffer is functionally similar to the ~org-roam-buffer~, but allows displaying any list of nodes ([[#screen-shots][see screen-shots above]]). When called interactively, it will prompt for the ~SOURCE-OR-QUERY~ and ~TITLE~. Note that when entering queries interactively either in ~org-roam-ql-search~ or in the transient, you can get completion-at-point with ~tab~. ~SORT-FN~ is used for sorting the results. It can be a string name of a registered sort function or a predicate function that can be used to sort the nodes (should take two nodes as input and return a non-nil value if the first node should be before the second). By default the following sort function are registered: ~file-mtime~, ~file-atime~, ~deadline~, ~scheduled~, ~point~, ~level~, ~file-title~, ~file~ and ~title~. Each corresponds to the respective slot of an org-roam-node. It is possible to register new sort functions with ~org-roam-ql-register-sort-fn~. These registered functions will also appear as options for completion in the transient.
 - =org-roam-ql-nodes (SOURCE-OR-QUERY)= :: Given a [[#valid-values-for-source-or-query][ ~SOURCE-OR-QUERY~ ]] , return a list of nodes.
 
 ** Valid values for ~SOURCE-OR-QUERY~