Add the ability for users to customize and rebind in-game keyboard shortcuts.

Currently, the platform uses a set of default keys for various actions. However, allowing users to choose their own preferred keys would significantly improve the user experience for several reasons:

Ergonomics & Personalization: Every setup is different. Many users prefer to map essential functions to keys that are more easily accessible during high-intensity efforts.

Accessibility: Not all users find the default layout intuitive or physically easy to use. Customizable keybindings would make the platform more inclusive for athletes with different needs.

Consistency: Many cyclists use multiple indoor training platforms. Being able to mirror the shortcuts they use elsewhere would reduce the learning curve and prevent accidental inputs.