[Site Wide] Clean up and integrate dependencies

[NicholasLYang]

Currently we vendor the docs-cms dependencies, i.e. google-docs-parser, docs-renderer-vue2, etc. This allows us to make changes and debug this code. However, it's still a separate library with a separate build process. In the future we should just integrate it into the code, so that we can debug it and build it with our existing system.