Tanstack useQuery, useMutation docs, deprecated custom useQuery

[amjithtitus09]

Update Data Fetching Documentation for TanStack Query Migration

Description

Updated the data fetching documentation to reflect our migration from custom hooks to TanStack Query. The new documentation provides clear examples and best practices for using TanStack Query in CARE.

Changes

• Replaced documentation for deprecated useQuery and useMutation hooks
• Added examples showing how to use TanStack Query with our existing route definitions
• Included practical examples for common use cases:
  • Basic data fetching
  • Query parameters
  • Path parameters
  • Mutations (create/update/delete)
  • Dependent queries
• Added direct links to relevant TanStack Query documentation sections
• Noted deprecation of legacy hooks

Additional Notes

• Documentation maintains compatibility with our existing route definition pattern
• Added links to TanStack docs for advanced features to avoid duplicating their documentation

Migration Guide

For teams migrating from the old hooks:

1. Replace useTanStackQueryInstead with useQuery from '@tanstack/react-query'
2. Replace useDeprecatedMutation with useMutation from '@tanstack/react-query'
3. Follow the examples in the updated documentation for proper query key structure

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