feat: handle old and new Nodule data structures

[ojeytonwilliams]

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• I have read and followed the contribution guidelines.
• I have read and followed the how to open a pull request guide.
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freeCodeCamp/freeCodeCamp#65857 looks to change the Nodule data structure, so this PR updates the mobile app to be able to handle both types:

{
  type: string,
  data: string | File[]
}

and

{
  type: string,
  contents: string
} | 
{
  type: string,
  files: File[]
}