Replace the gem mobility instead of globalize

[tyranja]

🔹 Mobility (More Flexible & Modern)
✅ Pros:

✔ Actively maintained & modern (recommended for new projects).
✔ Supports multiple backends (you can store translations in JSON, a separate table, or even key-value stores).
✔ Better performance (if using JSON or key-value store instead of joins).
✔ Works well with APIs & modern Rails versions.
❌ Cons:

✖ Slightly more complex setup than Globalize.
✖ Some features require extra configuration (e.g., using fallbacks properly).