feat: update branding and visuals across the project

- Updated the README to include a new banner image and changed the title emoji from 🦋 to ⚕.
- Modified various CLI outputs and scripts to reflect the new branding, ensuring consistency in the use of the ⚕ emoji.
- Added a new banner image asset for enhanced visual appeal during installation and setup processes.

hermes_cli/main.py

@@ -432,7 +432,7 @@ def cmd_update(args):
     import subprocess
     import shutil
     
-    print("🦋 Updating Hermes Agent...")
+    print("⚕ Updating Hermes Agent...")
     print()
     
     # Check if we're in a git repo