Implement --exec flag and PyAutoGUI-compatible automation API

- Add --exec flag to execute multiple scripts before main program
- Scripts are executed in order and share Python interpreter state
- Implement full PyAutoGUI-compatible automation API in McRFPy_Automation
- Add screenshot, mouse control, keyboard input capabilities
- Fix Python initialization issues when multiple scripts are loaded
- Update CommandLineParser to handle --exec with proper sys.argv management
- Add comprehensive examples and documentation

This enables automation testing by allowing test scripts to run alongside
games using the same Python environment. The automation API provides
event injection into the SFML render loop for UI testing.

Closes #32 partially (Python interpreter emulation)
References automation testing requirements

example_automation.py

@@ -0,0 +1,63 @@
+#!/usr/bin/env python3
+"""
+Example automation script using --exec flag
+Usage: ./mcrogueface game.py --exec example_automation.py
+"""
+import mcrfpy
+from mcrfpy import automation
+
+class GameAutomation:
+    def __init__(self):
+        self.frame_count = 0
+        self.test_phase = 0
+        print("Automation: Initialized")
+        
+    def periodic_test(self):
+        """Called every second to perform automation tasks"""
+        self.frame_count = mcrfpy.getFrame()
+        
+        print(f"Automation: Running test at frame {self.frame_count}")
+        
+        # Take periodic screenshots
+        if self.test_phase % 5 == 0:
+            filename = f"automation_screenshot_{self.test_phase}.png"
+            automation.screenshot(filename)
+            print(f"Automation: Saved {filename}")
+        
+        # Simulate user input based on current scene
+        scene = mcrfpy.currentScene()
+        print(f"Automation: Current scene is '{scene}'")
+        
+        if scene == "main_menu" and self.test_phase < 5:
+            # Click start button
+            automation.click(512, 400)
+            print("Automation: Clicked start button")
+        elif scene == "game":
+            # Perform game actions
+            if self.test_phase % 3 == 0:
+                automation.hotkey("i")  # Toggle inventory
+                print("Automation: Toggled inventory")
+            else:
+                # Random movement
+                import random
+                key = random.choice(["w", "a", "s", "d"])
+                automation.keyDown(key)
+                automation.keyUp(key)
+                print(f"Automation: Pressed '{key}' key")
+        
+        self.test_phase += 1
+        
+        # Stop after 20 tests
+        if self.test_phase >= 20:
+            print("Automation: Test suite complete")
+            mcrfpy.delTimer("automation_test")
+            # Could also call mcrfpy.quit() to exit the game
+
+# Create automation instance
+automation_instance = GameAutomation()
+
+# Register periodic timer
+mcrfpy.setTimer("automation_test", automation_instance.periodic_test, 1000)
+
+print("Automation: Script loaded - tests will run every second")
+print("Automation: The game and automation share the same Python environment")