[ENHANCEMENT] Streamline the contribution process for Pipedream

A user attempting to contribute to Pipedream faced a common issue related to Node.js, npm, and pnpm versions in their forked environment (error in husky push pre-hook).

We should:
- [ ] Develop a script that automatically sets up the development environment for contributors. This script should:
Detect and install the correct versions of Node.js, npm, and pnpm.
Configure any necessary environment variables and dependencies.

- [ ] Revise the existing documentation to include:
A clear, step-by-step guide on using the automated setup script.

- [ ] Announce these improvements to the community and welcome feedback.