QoL Update - Reflow the Step-by-Step instructions a bit

[ckittel]

Mostly non-functional changes. Added consistency between the pages, on the intro and outtro sections. Added accessibility descriptions.

Functional changes

• removed the dependency to update a file with copy and paste values just to complete these steps
• removed powershell instructions to keep it clean and simple (PowerShell was never listed as a prereq, but az cli was)
• redirect to "Clean up" after done with step-by-step instructions
• Added "try it out" stop points along the way

The whole process can now be completed without editing any files, introducing human error, etc.

Tested deployment end-to-end.