* [monorepo] rebuild lezer output as part of 'make install'
* [monorepo] run 'make install' with high concurrency in Jenkins
* [monorepo] rebuild lezer parser output once
* [monorepo] headless npm run
* [web] update docs for lezer
GitOrigin-RevId: f385bb8a9cdab1a6bfc28a8843b5128ceec364ec