new user add automatic add to app / dataset whitelist

### Self Checks

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- [x] I have searched for existing issues [search for existing issues](https://github.com/langgenius/dify/issues), including closed ones.
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### 1. Is this request related to a challenge you're experiencing? Tell me about your story.

new user add automatic add to app / dataset whitelist

### 2. Additional context or comments

_No response_

### 3. Can you help us with this feature?

- [x] I am interested in contributing to this feature.