refactor: rename states for clarity and consistency

- Updated state names in constants and related files from WAIT, REACT, TYPE, SLEEP to WAITING, REACTING, TYPING, SLEEPING.
- Adjusted all references to the renamed states across the codebase, including state handlers and transition logic.
- Ensured that logging messages reflect the new state names for better readability.

examples/basic-demo/simple-example.js

@@ -92,7 +92,7 @@ class SimpleOwenExample {
    * @returns {Promise<void>}
    */
   async demonstrateStateTransitions () {
-    const states = [States.REACT, States.TYPE, States.WAIT, States.SLEEP]
+      const states = [ States.REACTING, States.TYPING, States.WAITING, States.SLEEPING ]
 
     for (const state of states) {
       console.log(`🔄 Transitioning to ${state.toUpperCase()} state...`)