Add new fields to offer schema

[lam3lka]

As a bike owner
I want to introduce all the details about my motorcycle in the best possible way
so that I can rent my bike in a more transparent way.

Proposals of fields to add:

Details:

• 'traction control'/ kontrola trakcji
• 'electronic suspension adjustment'/ ESA, elektroniczna regulacja zawieszenia
• 'Anti-Lock Braking System'/ ABS

Accessories:

• 'GPS'

[michalmikolajczyk]

Please rephrase the user story, so that it is clear for the developers, i.e. change the phrases "all the details" and "best possible way" to more precise, specific instructions