Setting verse key by text

Add the ability to set a very key by text
Make the main.rs iterate random verses in John 3

src/cxx/mod.rs

@@ -5,14 +5,16 @@ pub mod ffi {
         include!("sword_rs/src/cxx/module.h");
 
         type Mgr;
-        type Module;
 
         fn new_mgr() -> UniquePtr<Mgr>;
         fn new_mgr_with_path(path: &String) -> UniquePtr<Mgr>;
         fn get_modules(self: &Mgr) -> Vec<String>;
         fn get_module(self: Pin<&mut Mgr>, name: &String) -> UniquePtr<Module>;
 
+        type Module;
+
         fn get_name(self: &Module) -> String;
+        fn set_key_text(self: Pin<&mut Module>, key_text: &String) -> ();
         fn strip_text(self: Pin<&mut Module>) -> String;
     }
 }

src/cxx/module.h

@@ -20,4 +20,8 @@ class Module {
                 (const char*) this->module->stripText()
             );
         }
+
+        void set_key_text(const rust::String& keyText) {
+            this->module->setKeyText(std::string(keyText).c_str());
+        }
 };