Add Automation gas threshold script

[thedriftofwords]

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Below is a summarization created by an LLM (gpt-4-turbo-2024-04-09). Be mindful of hallucinations and verify accuracy.

Why

Introduces a script to set a maximum gas price for Chainlink Automation upkeeps, enhancing cost management.

What

README.md

• Added instructions for setting up the project
• Added steps to clone, navigate, install dependencies, and set variables

index.js

• Added script to configure and encode offchain upkeep configuration
• Script includes transaction sending and handling

package.json

• Created package file with project metadata and dependencies
• Added cbor and ethers as dependencies