Update wiki

[lvlindv]

This pull request updates the documentation for setting up and using the Azure Region Selection Toolkit, focusing on making the instructions clearer and providing more concrete PowerShell usage examples. The main improvements include replacing module version lists with install commands, clarifying step-by-step instructions, and ensuring code samples are consistently formatted.

Documentation improvements:

• Replaced static lists of required Azure PowerShell modules with explicit Install-Module commands for easier setup in Setup-and-Prerequisites.md. Also improved instructions for cloning the repository and clarified the directory structure.
• Updated Step-by-Step-Guide.md to consistently use PowerShell code blocks for all commands, clarified navigation and script usage steps, and restructured explanations for better readability.

Process clarification:

• Provided more detailed instructions for running each major script in the toolkit, including expected outputs and file locations, and clarified the order and dependencies between steps.
• Improved explanations about the purpose and limitations of each script, such as the status of the availability check and the nature of cost data.

[jfaurskov]

LGTM