Document Ansible core requirements for deb822_repository and npm module

[93jun]

I hit two module resolution failures when running this role in a clean Debian-family container with ansible-core-only installs.

Observed failures:

• With ansible-core 2.14, the Debian setup path fails while resolving ansible.builtin.deb822_repository in tasks/setup-Debian.yml.
• With ansible-core 2.15, the repository setup gets past that point, but the role then fails while resolving the npm module in tasks/main.yml.

The second failure may not show up when using the full ansible distribution, since that can include community collections. With ansible-core-only installs, it looks like the role needs both:

• a minimum Ansible/core version high enough for ansible.builtin.deb822_repository, and
• an explicit documented collection requirement or module namespace for the npm tasks.

Relevant task locations:

• tasks/setup-Debian.yml uses ansible.builtin.deb822_repository.
• tasks/main.yml uses npm for global package installs and package.json installs.