Revert PR #290 documentation changes, preserve CHANGELOG entry

[Copilot]

PR #290 bundled a v1.6.0 CHANGELOG entry with unwanted documentation restructuring. This PR reverts the documentation changes while preserving the CHANGELOG update.

Changes

• Restored deleted files

  • js/react-native/docs/README.md
  • js/react-native/docs/MULTILANGUAGE.md

• Restored directory structure

  • Moved conversations.md and messages.md back to features/ subdirectory

• Preserved

  • v1.6.0 CHANGELOG entry remains intact

Structure

js/react-native/docs/
├── README.md           # restored
├── MULTILANGUAGE.md    # restored
└── features/
    ├── conversations.md  # moved back
    └── messages.md       # moved back

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