[feat] Implement CoinGecko api to get token prices

[trbutler4]

Add support to the wallet app (wallet_app/android) for coingecko API to retrieve token price. The free (demo) plan is enough for now.

References

https://docs.coingecko.com/v3.0.1/reference/introduction

[Gerson2102]

Hey can I work on it? Is related to Kotlin?

[onlydustapp]

Hey @Gerson2102!
Thanks for showing interest.
We've created an application for you to contribute to Starknet Phone.
Go check it out on OnlyDust!

[sajalbnl]

Hey @trbutler4 i want to work on this . I am familiar with the flow

[onlydustapp]

Hey @sajalbnl!
Thanks for showing interest.
We've created an application for you to contribute to Starknet Phone.
Go check it out on OnlyDust!

[Iwueseiter]

Hi @trbutler4 please can I work on this?

[onlydustapp]

Hey @Iwueseiter!
Thanks for showing interest.
We've created an application for you to contribute to Starknet Phone.
Go check it out on OnlyDust!

[codeZe-us]

I am applying to this issue via OnlyDust platform.

My background and how it can be leveraged

Mobile Software Developer utilising Dart, Swift and Kotlin.

How I plan on tackling this issue

Implement API service interface and instances.
Create data models.

[trbutler4]

I am assigning @sajalbnl since he is already familiar with this code