No agent PR descriptions (#45790)
* No AI descriptions
* Update .github/PULL_REQUEST_TEMPLATE.md
Co-authored-by: Quentin Gallouédec <45557362+qgallouedec@users.noreply.github.com>
* Update .github/PULL_REQUEST_TEMPLATE.md
Co-authored-by: Quentin Gallouédec <45557362+qgallouedec@users.noreply.github.com>
* Update .ai/AGENTS.md
Co-authored-by: Quentin Gallouédec <45557362+qgallouedec@users.noreply.github.com>
* Clearer guidelines for first-time contribs
* Contrib cleanup
* Contrib cleanup
* AGENTS cleanup
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Co-authored-by: Quentin Gallouédec <45557362+qgallouedec@users.noreply.github.com>
