Add Support for Multiple Languages

[DevFoxxx]

To make VirtualDyno accessible to a wider audience, we need to translate the app's interface into Spanish, French, and German. Currently, the app only supports Italian and English.

Tasks:

• Create/Update translation files in the /assets/languages (or /locales) folder.
• Provide accurate translations for technical terms like "Torque", "Curb Weight", "Drag Coefficient", and "Gear Ratios".
• Ensure the UI handles longer word lengths (e.g., German words can be significantly longer than Italian ones).

How to contribute:

1. Locate the existing en.json or it.json file.
2. Create a new JSON file for the language you wish to add (e.g., es.json).
3. Translate the values while keeping the keys identical.
4. Open a Pull Request!