feat(gallery): add azure-network-manager-demo scenario

[petender]

New Template Registration

Field	Value
Scenario	azure-network-manager-demo
Repo	petender/tdd-azd-azure-network-manager-demo
Tags	az-700,az-104,msft,vnets,bastion,virtualmachine,loganalytics
Sample App	No
Demo Guide	Yes
Contributor	@petender

Tag Validation

All tags validated against src/data/tags.tsx TagType union: ✅ PASSED

Deployment

gh repo clone petender/tdd-azd-azure-network-manager-demo cd tdd-azd-azure-network-manager-demo azd init azd up

[rob-foulkrod]

While validating this template, I noticed the README says azd up will prompt for the VM admin username/password. In practice, the template reads these values from environment variables:

• AZURE_VM_ADMIN_USERNAME
• AZURE_VM_ADMIN_PASSWORD

I tested with a clean .azure environment and no cached values; azd up did not prompt for the missing password and proceeded until Azure failed with osProfile.adminPassword missing/null.

Validation succeeded after setting the variables manually, but environment variables are not the common/expected path for trainers using this catalog. Prompting during azd up would be the preferred experience here, matching the README.

Could you either wire these as prompted azd inputs, or update the deployment instructions clearly if env vars must remain required?