user dir in classpath

we should put $conda_env/usr/share/beakerx/jars (or something) into classpath too (edit it into the kernel.json files).

undeclared dependency like this is bad but there seem too often %classpath mvn goes to network instead of disk.

unclear how anything can really match the performance of loading in advance.

Inspect the kernel.json files and the existing %classpath handling to understand how kernel classpaths are assembled. Verify whether $conda_env/usr/share/beakerx/jars can be added without breaking other kernels, then confirm that local Maven dependencies no longer go to the network unnecessarily.

Written by the indexing model from the issue text.