compileProtos: Generating for esm/src uses default root

[orgads]

Environment details

• OS: Linux
• Node.js version: 20.9.0
• npm version: 10.1.0
• gax-nodejs version: gapic-tools@0.2.0

Steps to reproduce

compileProtos esm/src --esm (generated by https://github.com/googleapis/gapic-generator-typescript when passing --format esm)

The generateRootName function tries to locate package.json one directory above the input path, but in this case it should hop through 2 parent directories. I wonder if it makes sense to just use package.json from the current directory, at least when the path is relative and doesn't start with ../.