Refactor project branding from HexaHost to Axiom across all configurations, documentation, and code files. Update environment variables, Docker setup, and README to reflect the new brand name. Ensure consistency in naming conventions and improve clarity in setup instructions.

.github/workflows/ci.yml

@@ -36,9 +36,9 @@ jobs:
           TUNNEL_ENABLED: "false"
         run: |
           python - <<'PY'
-          from core.hexahost import HexaHost
+          from core.axiom import Axiom
           from api.server import create_app
-          bot = HexaHost()
+          bot = Axiom()
           create_app()
           import cogs
           print("imports ok")