feat: Add Bounty Bot PRO with AI Quality Scoring

[allornothingai]

Addresses Scottcjn/rustchain-bounties#2126

This PR introduces Bounty Bot PRO, a Python-based automated verifier that:

1. Automatically verifies GitHub follow/star status for payout calculation.
2. Checks wallet validity on the RustChain node.
3. Implements AI Quality Scoring using local/API LLMs (currently configured for Gemini) to evaluate the Technical Depth, Clarity, and Originality of written contributions.

Maintainers can run this locally or via GitHub Actions to instantly generate a Markdown verification report and payout recommendation.

Wallet: allornothingai

[github-actions]

Welcome to RustChain! Thanks for your first pull request.

Before we review, please make sure:

• Your PR has a BCOS-L1 or BCOS-L2 label
• New code files include an SPDX license header
• You've tested your changes against the live node

Bounty tiers: Micro (1-10 RTC) | Standard (20-50) | Major (75-100) | Critical (100-150)

A maintainer will review your PR soon. Thanks for contributing!

[allornothingai]

I have just pushed a commit adding the required header to the new files. I don't have the permissions to add the label myself, so could a maintainer please attach it? Thanks!

[arifinizra93-bit]

Good submission. The implementation looks solid.