Improved performance and accuracy, improved JAX & PyTorch profiling

What's Changed

Performance and Correctness

• Fix line invalidation speed by @sternj in #891
• Disable JITs in JAX and PyTorch to enable effective profiling by @emeryberger in #892

Minor changes

• Linted JS code, packaged Prism by @emeryberger in #884
• Refactoring js by @emeryberger in #885
• More refactoring by @emeryberger in #886
• Persistence refactoring by @emeryberger in #887
• Optimization refactoring by @emeryberger in #888
• Cruft removal. by @emeryberger in #890

Full Changelog: v1.5.48...v1.5.49