Add option for no workspace switch on click

In sway/workspaces, just like disable-scroll turns on/off the ability to
change workspaces by scrolling the mouse add disable-click that turns
on/off the ability to change workspaces by clicking.

man/waybar-sway-workspaces.5.scd

@@ -31,6 +31,11 @@ Addressed by *sway/workspaces*
     default: false ++
     If set to false, you can scroll to cycle through workspaces. If set to true this behaviour is disabled.
 
+*disable-click*: ++
+    typeof: bool ++
+    default: false ++
+    If set to false, you can click to change workspace. If set to true this behaviour is disabled.
+
 *smooth-scrolling-threshold*: ++
     typeof: double ++
     Threshold to be used when scrolling.

src/modules/sway/workspaces.cpp

@@ -249,6 +249,7 @@ Gtk::Button &Workspaces::addButton(const Json::Value &node) {
   auto &&button = pair.first->second;
   box_.pack_start(button, false, false, 0);
   button.set_relief(Gtk::RELIEF_NONE);
+  if (!config_["disable-click"].asBool()) {
     button.signal_pressed().connect([this, node] {
       try {
         if (node["target_output"].isString()) {
@@ -265,6 +266,7 @@ Gtk::Button &Workspaces::addButton(const Json::Value &node) {
         spdlog::error("Workspaces: {}", e.what());
       }
     });
+  }
   return button;
 }