[BUG] App does not work when balance is too big

[LaimeJesus]

related #143

Description

This PR fixes the issue that was impeding to use the application to Martin, there was an issue with the amount of tokens that he had, it adds the following changes:

• Fixes
  • issue when user has a big amount of crc tokens, the main issue was using parseInt instead of using them as BigNumbers
• use new transformation from number to string in useMintGroupToken hook
• Changes
  • formatToken does not return a number anymore, adds a fromBN method
  • conversion function from string to circles and tc amounts does not convert to numbers anymore

How to Test

To test this fixes we need to import the Martin safe address account into the your safe app:

• Martin Address: 0x42cEDde51198D1773590311E2A340DC06B24cB37

After that, do the usual steps:

• import the custom safe app
  as we aren't the owners of the safe, we will only be able to navigate the app
• navigate some of the pages
• go to mint tokens for a group

Example

• initial page
  

• mint group shisus group page
  

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Name	Status	Preview	Updated
circles-groups-safe-app	✅ Ready (Inspect)	Visit Preview	Jul 28, 2022 at 7:15PM (UTC)

[marcelorubini]

App is loading without any issue after importing Martin's safe! 🚀