docs: Update getSamples.md

[bobbyjcolley]

Description

Resolves #81 by adding a table with permissions and a sample permissions object

Fixes #81

Type of change

Documentation update

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have checked my code and corrected any misspellings

[bobbyjcolley]

Hi React Native Health!

I'm considering this a WIP PR since I did some digging around and wanted to make sure I was clear on what getSamples can return. The current documentation for getSamples describes the options object as a HealthInputOptions object. Thus, the type of options object would be a 'HealthObserver' enum property, which only 5 are listed currently in the documentation:

https://github.com/agencyenterprise/react-native-health/blob/master/docs/getSamples.md#getsamples

let options = {
  startDate: new Date(2021, 0, 0).toISOString(),
  endDate: new Date().toISOString(),
  type: 'Walking', // one of: ['Walking', 'StairClimbing', 'Running', 'Cycling', 'Workout']
}

Should the documentation be updated to reflect all the properties of the HealthObserver enum? Or can getSamples only receive these 5 types?

If so, I will update the permissions table to make sure to account for everything here.

Otherwise, I can make a separate enum for this 'GetSamplesOptionsType' and update the types correctly.