feat: add --version flag for op-rbuilder

[estensen]

📝 Summary

Output op-builder version, not reth version

💡 Motivation and Context

Resolves #550

Before

cargo run -p op-rbuilder --bin op-rbuilder -- --version
...
reth-optimism-cli Version: 1.3.4-dev
Commit SHA: 90c514ca818a36eb8cd36866156c26a4221e9c4a
Build Timestamp: 2025-04-06T12:58:42.729418000Z
Build Features: jemalloc
Build Profile: debug

After

cargo run -p op-rbuilder --bin op-rbuilder -- --version
...
op-rbuilder 0.1.0

Could consider outputting more than just the version.

✅ I have completed the following steps:

• Run make lint
• Run make test
• Added tests (if applicable)

[Copilot]

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