Add 3.0.0-3.0.2 release notes to release history

[liquidsec]

The release history page stops at 2.8.6 -- 3.0.0, 3.0.1, and 3.0.2 were never added, so https://www.blacklanternsecurity.com/bbot/Stable/release_history/ has been stale since July.

Adds all three, using the published GitHub release bodies as the source, with three adaptations for the docs site:

• > [!WARNING] becomes an !!! warning admonition. GitHub's alert syntax renders as a plain blockquote with a literal [!WARNING] under mkdocs; admonition is already enabled in mkdocs.yml.
• Bare #NNNN refs become real links. They autolink on GitHub but not in mkdocs. All 70 unique refs were classified via the API: 66 PRs, and 4 issues (3258, 3270, 3272, 3279) pointed at /issues/ instead of /pull/.
• The migration guide link is relative (./migration/3.0_breaking_changes.md) rather than a hardcoded /Stable/ URL, so it resolves correctly in both the Dev and Stable builds.

One line was restored that is in the local 3.0.0 draft but absent from the published body: the GPL-3.0 to AGPL-3.0 relicense (PR 2769). pyproject.toml on stable has license = "AGPL-3.0" and LICENSE is AGPLv3.

Note that the Stable docs only rebuild on a push to stable, so the live page will pick this up at the next release.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90%. Comparing base (a394d12) to head (90d704a).

Additional details and impacted files

@@          Coverage Diff          @@
##             dev   #3408   +/-   ##
=====================================
  Coverage     90%     90%           
=====================================
  Files        454     454           
  Lines      47081   47081           
=====================================
  Hits       42320   42320           
  Misses      4761    4761           

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.