fr-bareme-km

Offline command-line calculator for the official French mileage allowance
scale (bareme kilometrique) used to deduct actual professional expenses,
declaration years 2022 to 2026: cars, motorcycles and mopeds, with the
20 % increase for electric vehicles. Prints the amount and the distance band,
or JSON with --json.

Example: fr-bareme-km --year 2026 --vehicle car --cv 5 --km 4000

Links:
- https://macalculatriceenligne.com/ (MaCalculatriceEnLigne, French online calculators)
- https://macalculatriceenligne.com/finance/divers/calcul-frais-kilometriques/ (online mileage allowance calculator)
- https://codeberg.org/tresor2k/macalc-go (Go source code, MIT)