Premium tiers: simulator for jest fit lock/earn#406

There is a simulator on site but improvable and should be included in app on premium section.

Typically compare, based on users’ assets:

• current benefits (purchase fees, earnings, … per crypto - limited to users’ assets)
• would be benefits (with by default proposed upgrade or not if not relevant)

For instance, for x locked CHSB, earning interests for y can be best at generation premium, but for x’ locked, it could be better to upgrade account while reducing CHSBs in earn….

User should be able to tune the parameters (for exemple, what if buying some more chsb)

Graphical reoresentation could help understanding and decision making, while promoting chsb.