feat: TOML config loader for vehicles, journeys, and tax scales

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/config_loader.py

@@ -0,0 +1,27 @@
+from flask import current_app
+
+
+def get_vehicles():
+    return current_app.config.get("TOML", {}).get("vehicles", {})
+
+
+def get_journeys():
+    return current_app.config.get("TOML", {}).get("journeys", {})
+
+
+def get_bareme(year: int, cv: int) -> list[dict]:
+    bareme = current_app.config.get("TOML", {}).get("bareme_kilometrique", {})
+    year_data = bareme.get(str(year), {})
+    if cv <= 5:
+        key = "cv_5"
+    elif cv <= 7:
+        key = "cv_6_7"
+    elif cv <= 9:
+        key = "cv_8_9"
+    else:
+        key = "cv_10_11"
+    return year_data.get(key, {}).get("tranches", [])
+
+
+def day_types_without_journey():
+    return {"TT", "MALADE", "CONGE", "RTT", "FERIE"}