Implementing a search modal (stretching the level of dynamic that is possible without going to frameworks).
## Major Change
- Search needs packages and is available everywhere now; so had to add reviewed and user packages to global context.
Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#185
Co-authored-by: Tobias O <tobias.olenyi@envipath.com>
Co-committed-by: Tobias O <tobias.olenyi@envipath.com>
