Fork and update external adapter examples

[dwightjl]

• https://github.com/thodges-gh/CL-EA-NodeJS-Template
• https://github.com/thodges-gh/CL-EA-Python-Template

The URLs in the docs recently changed: https://github.com/smartcontractkit/documentation/pull/452

Fork the original examples, update them, and restore them in the documentation.

[aelmanaa]

1. We need an external adapter starter kit
2. Only then we can update the docs and point to the right repo