chore: add support for "bpi" when building the preview

[tbouffard]

Also add test data for BPI.

Notes

Validation of the build of the BPI preview done in https://github.com/bonitasoft/bonita-process-insights-doc/pull/2

[github-actions[bot]]

🎊 PR Preview 9b540ef148d5a39e8ae4123e4545ec81e7872749 has been successfully built and deployed to https://bonitasoft-bonita-documentation-site-test-pr-721.surge.sh

🕐 Build time: 0.009s

_{🤖 By surge-preview}

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[github-actions[bot]]

🎊 PR Preview 9b540ef148d5a39e8ae4123e4545ec81e7872749 has been successfully built and deployed to https://bonitasoft-bonita-documentation-site-deploy-pr-721.surge.sh

🕐 Build time: 0.011s

_{🤖 By surge-preview}