Build for Fireproof Packages on CDNJS

We need to determine the optimal CDNJS distribution approach for our packages, especially considering script tag users and Claude's environment limitations.

### Current Challenges:

1. **Package Import Path Resolution**
- CDN paths like `https://cdnjs.cloudflare.com/ajax/libs/angular/19.0.6/core.umd.min.js` don't align with import statements using `@fireproof/core`
- Import statements in `use-fireproof` won't automatically resolve to correct CDN paths

2. **Claude Environment Constraints**
- Claude can only load libraries from cdnjs
- Direct artifact URLs must be provided with specific versions (no "latest" redirects)
- Script tag redirects don't appear to work in Claude's environment

### Potential Solution:

Focus on the CDNJS-specific distribution with URL pattern:
`https://cdnjs.cloudflare.com/ajax/libs/use-fireproof/0.20.0/indexeddb.umd.min.js`

## Next Steps

- Evaluate build configuration changes needed for CDNJS-optimized bundles
- Put the versioned CDN URL into our LLMS.txt