docs: all sub-repos — README should display product banner and link back to azurelocal.cloud

[kristopherjturner]

Summary

Every sub-repository README.md should display the product banner SVG at the top and include a direct link back to azurelocal.cloud, so that the repo is immediately recognizable and navigable as part of the Azure Local ecosystem.

Requirements

1. Banner SVG — Display the product banner as the first visual element in the README:

   ![Product Name](docs/assets/images/product-banner.svg)

2. Link to azurelocal.cloud — Add to the README header section:

   > Documentation: [azurelocal.cloud](https://azurelocal.cloud) | Solutions: [Azure Local Solutions](https://azurelocal.cloud)

3. Badge — Add an azurelocal.cloud badge near the top of the README alongside existing badges:

   [![Azure Local](https://img.shields.io/badge/Azure%20Local-azurelocal.cloud-0078D4?logo=microsoft-azure)](https://azurelocal.cloud)

Repos Requiring This Change

• azurelocal-avd (blocked by logo/banner feat(docs): Add Azure Local 2604 features — Simplified Provisioning, SAN deployment, Local Identity GA #45)
• azurelocal-sofs-fslogix (blocked by logo/banner #86)
• azurelocal-loadtools (blocked by logo/banner chore(main): release 2604.1.0 #22)
• azurelocal-vm-conversion-toolkit (blocked by logo/banner [INFRA] Standardize variable management, naming, and structure across all repositories #15)
• azurelocal-nutanix-migration (blocked by logo/banner Brainstorm: additional Azure Local solutions #5)
• azurelocal-training (blocked by logo/banner [Project] Create and integrate 10 new Azure Local solution repos #26)
• azurelocal-copilot (blocked by logo/banner Audit Docusaurus site — evaluate migration to MkDocs Material #2)
• azurelocal-ranger ✅ (has banner, check for azurelocal.cloud link)
• azurelocal-S2DCartographer ✅ (has banner, check for azurelocal.cloud link)

Acceptance Criteria

• README.md opens with the product banner SVG
• README.md contains a visible link to https://azurelocal.cloud
• README.md badge set includes the Azure Local badge

[kristopherjturner]

All 9 sub-repos updated: banner SVG in README, Azure Local badge, and azurelocal.cloud documentation link. azurelocal-nutanix-migration also received a new README (it had none). Ranger and S2DCartographer already had banners — badge and link added.