[gnome-builder/wip/gtk4-port] libide/gui: add open keybinding

[Christian Hergert <chergert src gnome org>]

commit 62729f38ffaf769659e3a615df1a5a61ffb80679
Author: Christian Hergert <chergert redhat com>
Date:   Fri May 6 17:55:07 2022 -0700

    libide/gui: add open keybinding

 src/libide/gui/gtk/keybindings.json | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/libide/gui/gtk/keybindings.json b/src/libide/gui/gtk/keybindings.json
index d484fce52..3454e6d6d 100644
--- a/src/libide/gui/gtk/keybindings.json
+++ b/src/libide/gui/gtk/keybindings.json
@@ -5,6 +5,9 @@
 /* New Files */
 { "trigger" : "<Control>n", "action" : "editorui.new-file", "when" : "canEdit()", "phase" : "bubble" },
 
+/* Open Files */
+{ "trigger" : "<Control>o", "action" : "workbench.open", "when" : "canEdit()", "phase" : "bubble" },
+
 /* Switching pages in grid */
 { "trigger" : "<Alt>1", "action" : "frame.page", "args" : "1", "when" : "inGrid()", "phase" : "capture" },
 { "trigger" : "<Alt>2", "action" : "frame.page", "args" : "2", "when" : "inGrid()", "phase" : "capture" },