[sway] use caps lock as ctrl

sway/config.d/keyboard.conf

@@ -0,0 +1,10 @@
+### Input configuration
+#
+# You can get the names of your inputs by running: swaymsg -t get_inputs
+# Read `man 5 sway-input` for more information about this section.
+  # xkb_options caps:ctrl_modifier
+input type:keyboard {
+  xkb_layout "fr,us"
+  xkb_variant "azerty"
+  xkb_options caps:ctrl_modifier
+}