Add initial AbuseIPDB integration scaffold

[vanessamadison]

Motivation

I wanted to get a clean starter integration into the repo first so we can iterate in follow-up PRs on:
• API/auth implementation
• metric/service-check definitions
• final README/manifest content and dashboard details

Review checklist

• PR has a meaningful title or PR has the no-changelog label attached
• Feature or bugfix has tests
• Git history is clean
• If PR impacts documentation, docs team has been notified or an issue has been opened on the documentation repo
• If this PR includes a log pipeline, please add a description describing the remappers and processors. (N/A — no log pipeline in this PR)

Additional Notes
• This PR intentionally keeps template placeholders in README/manifest for follow-up completion.
• Local test execution is currently blocked by missing Python 3.13 in the local environment; test scaffolding is included and will be exercised once the interpreter is available.
• Follow-up PRs will add real AbuseIPDB check logic and complete validation fixes.

[datadog-prod-us1-3]

✨ Fix all issues with BitsAI

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[buraizu]

Approving, since the doc is not set to display on the public website and the README content is expected in a follow-up PR per the description