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[I18N: VN] Add Vietnamese translation for all 3 versions

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Add Vietnamese translation for all 3 versions

Refactor: Update Vietnamese translations

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## What does this PR do? Update Vietnamese translations. ## Checklist - [x] Have you read the [Contributing Guidelines on issues](https://github.com/appwrite/appwrite/blob/master/CONTRIBUTING.md)? - [x] If the PR includes a change to...

Update Vietnamese translation

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### Describe the changes you have made: Update Vietnamese translation to be more fluently, it was google-translated. a lot ### Reference any relevant issues (e.g. "Fixes #000"): No relevant issues....

Update Vietnamese translation.