feat(esbuild-decorators): Support yarn and pnpm workspaces

[vicary]

When the tsconfig option is ignored, the current behaviour is to assume ./tsconfig.json.

But for workspaces, it should in fact search for the closest parent directory with a package.json.

There are existing packages that do the job already,

1. find-yarn-workspace-root
2. @pnpm/find-workspace-dir