fix: restore stale Go generated files and missing esbuild platform packages in lockfile

- go/rpc/zrpc.go, zrpc_encoding.go, zsession_encoding.go, zsession_events.go,
  go/zsession_events.go: an earlier rebase conflict resolution incorrectly
  kept a stale version of these generated files, missing the
  PermissionRequestExtensionEnvAccess type and numerous SessionEventType
  constants added on main. This broke the Go build and the docs-validation
  check. Restored from upstream/main's current generated output (the PR
  itself never modified these files).
- nodejs/package-lock.json: a prior lockfile regeneration (npm install
  --package-lock-only run on a Linux sandbox) only recorded the current
  platform's optional esbuild binary package instead of all supported
  platforms, breaking npm ci on macOS/Windows runners
  (missing @esbuild/darwin-arm64 etc). Regenerated starting from main's
  lockfile as a base so all platform-specific optional dependency entries
  are preserved.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: SteveSandersonMS