feat: add verification scripts as example

[TucksonDev]

This PR adds two verification scripts to the examples folder: one for a Rollup, and one for a TokenBridge. Instructions of how to run it are included in the README file.

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NOTE: This is a WIP, do not merge yet.

Integration tasks:

• Remove ts-node dependency
• Analyze whether the arbitrum SDK dependency can be removed
• Add back the type: module configuration parameter
• Move verification functions to the SDK src folder
• Remove orbitHandler wrapper
• Clean up lib files
• Clean up package.json and yarn.lock files (they shouldn't add any new package)