Chores for undeprecating AksSamples

• Update chart yamls to support currently GA supported k8s version
• Update usage of dependency charts, like ingress-nginx and cert-manager
• Update Dockerfile to using Windows Server 2022 (current default for deploying nodes in AKS)
• Update to .NET 6 .NET 8 :)
• Update nuget dependencies
• Restructure code to adhere to new paradigms coming with .NET 6, such as replacing singleton pattern with dependency injection, changes to web host creation and similar
• Update docs for provisioning and deployment
• Add Actions workflow CI for build validation and unit test runs
• Remove (Deprecated) folder name suffix
• (Remove useless ghost docs?)

@samarthasthana My company is currently evaluating to do these steps for the eco-system. If they decide to go with it and providing we deliver same or higher quality than the current sample, would you be open for merging our efforts into this repo? This would also resolve the numerous auto PRs from dependabot that are currently open.

Start by reviewing the AksSamples area and the completed checklist in this issue; no specific files, tests, or entry points are named. Confirm whether the listed modernization work is still needed, then use the checklist as the definition of done for the .NET, AKS, dependency, documentation, CI, and naming updates.