Add a 'Level' filter to easily find templates for beginner, intermediate and advanced audiences

**Is your feature request related to a problem? Please describe.**
"I think it is amazing we can deploy really complicated workloads but some of people who come across this page are not experts and certainly do not need such complicated deployments to "get started" with the technology. These users seek straightforward guidance on deploying Flask, Django, or FastAPI on Azure services such as ACA, App Service, and Functions. Including numerous additional services can be overwhelming and counterproductive"

**Describe the solution you'd like**
An easier way to land on templates that allow developers to go on a journey of crawl -> walk -> run

**Describe alternatives you've considered**
A clear and concise description of any alternative solutions or features you've considered.

**Additional context**
Add any other context or screenshots about the feature request here.