add web app routing experience

[OliverMKing]

Description

• Adds the Draft a web app routing ingress experience
• Slightly modifies the walkthrough to fully walk through user to getting application onto AKS
• Modify our Azure auth method to use the cli :( (auth is just broken for the Azure extension https://github.com/Azure/azure-sdk-for-js/issues/22904)

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [x] This change requires a documentation update

How Has This Been Tested?

Unit tested where possible. Tested locally for everything else. Will get pms to fully test before releasing but this is already such a huge update it makes sense to get it merged in than make incremental improvements.

I do want to improve the deploy experience to link to the generated ingress address but this pr is already huge.

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] Any dependent changes have been merged and published in downstream modules

[OliverMKing]

Will squash merge this whenever it's merged in haha

[OliverMKing]

looks good to me apart from minor typo but do we have a plan for the future to replace manual/local testing?

There's ways to fully e2e test extensions like https://github.com/redhat-developer/vscode-extension-tester plus something similar to what you did in K8s-deploy. When we add it will just depend on our priorities.