Remove stackpop references for the IABTechLab transfer #418

EdgeZero is moving to the IABTechLab GitHub org by repository transfer. The repo should no longer reference stackpop once it lands there.

A transfer redirects the repository URL. It does not carry over:

• the GitHub Pages site (stackpop.github.io/edgezero becomes iabtechlab.github.io/edgezero);
• the org-level project board and issue types that the issue-creator and pr-creator agents use by ID.

Scope: repository and docs URLs, the generator's git fallbacks, action uses: examples, the agent configs, and the copyright holder.