Replace common/*, browser/*, and headless/* path-mapped imports with
relative paths across src/, addons/, test/, and demo/. Remove paths
from all tsconfig.json files and include addon typings directly.
Addon sources import shared code via out-esbuild/ so unit tests resolve
compiled modules with runtime const enums. Fix benchmark bare imports
and normalize corrupted tsconfig formatting.
Resolves#5896
Co-authored-by: Daniel Imms <Tyriar@users.noreply.github.com>