Model deployment code template cannot change namespace

**Describe the bug**
Right now the model deployment code template is hard coded to the `anonymous` namespace, we need to make it configurable in order to work in the multi-user environment.

**To Reproduce**

Steps to reproduce the behavior:
1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

**Expected behavior**

A clear and concise description of what you expected to happen.

**Screenshots**

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**Environment**

- OS: [e.g. iOS]
- Browser [e.g. chrome, safari]
- MLX Version [e.g. 22]

**Additional context**

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