bug: remove mashlib-local dist from JSS — should not be bundled #220

Summary

JSS bundles src/mashlib-local/ which includes a full mashlib build with its own node_modules/. This couples JSS to mashlib and bloats the distribution.

Why this is wrong

• JSS should not distribute mashlib — it's a separate project
• The src/mashlib-local/ directory adds significant size and dependencies
• CDN mode (--mashlib-cdn) and ES module mode (--mashlib-module) already work without any local files
• Users who want local mashlib can install it themselves

Current behavior

• src/mashlib-local/ contains a vendored mashlib build with its own node_modules/
• --mashlib (local mode) serves from this directory
• This gets published to npm as part of the JSS package

Expected behavior

• Remove src/mashlib-local/ from the repo and npm package
• Keep --mashlib-cdn and --mashlib-module as the supported modes
• If local mode is needed, document how to install mashlib separately and point JSS at it via config
• JSS should not be coupled to or distribute mashlib