init python venv and installed basic requirements

ha-dev-config/configuration.yaml

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+# Configuration Home Assistant Dev
+
+homeassistant:
+  name: HA Dev
+  unit_system: metric
+  time_zone: Europe/Paris
+  packages: !include_dir_named packages
+
+# Activer le frontend
+frontend:
+  themes: !include_dir_merge_named themes
+
+# Logger en mode debug pour le dev
+logger:
+  default: info
+  logs:
+    custom_components.light_preset_manager: debug
+
+# MQTT - Connexion au broker du Pi
+mqtt:
+  broker: z2m # ← IP de ton Pi (z2m)
+  port: 1883
+  username: !secret mqtt_user  # Si authentification
+  password: !secret mqtt_pass
+
+# Inclure les scènes
+scene: !include scenes.yaml
+
+# Désactiver les checks pour le dev
+config:
+
+# API pour les tests
+api:
+
+# Permettre les ressources locales
+http:
+  use_x_forwarded_for: false
+  trusted_proxies: []