Add Deploy-Hub helper script

[flanakin]

🛠️ Description

Add Deploy-Hub.ps1, a wrapper around Deploy-Toolkit that simplifies FinOps hub deployments for local testing by providing scenario-based flags instead of requiring you to remember all the Bicep parameter names.

• Uses {initials}-{name} naming convention (initials from git config user.name, name defaults to adx)
• Supports ADX (default), storage-only (-StorageOnly), and Fabric (-Fabric) deployment scenarios
• Includes -Remove mode to list or delete test resource groups
• Documented in src/scripts/README.md

📋 Checklist

🔬 How did you test this change?

• 🤏 Lint tests
• 🤞 PS -WhatIf / az validate

🙋‍♀️ Do any of the following that apply?

• 🚨 This is a breaking change.
• 🤏 The change is less than 20 lines of code.

📑 Did you update docs/changelog.md?

• ❎ Log not needed (small/internal change)

📖 Did you update documentation?

• ✅ Internal dev docs in src (required for dev)

[Copilot]

Pull request overview

Adds a new PowerShell helper to streamline local FinOps hub deployments by wrapping Deploy-Toolkit with scenario-based flags, and documents the new workflow in the scripts README.

Changes:

• Added src/scripts/Deploy-Hub.ps1 helper wrapper for ADX (default), storage-only, and Fabric scenarios, plus a -Remove cleanup mode.
• Updated src/scripts/README.md to document Deploy-Hub usage and examples.
• Minor markdown cleanup in src/scripts/README.md (formatting consistency in later sections).

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
src/scripts/Deploy-Hub.ps1	New wrapper script around Deploy-Toolkit to simplify local FinOps hub deployments and test-environment cleanup.
src/scripts/README.md	Adds a new Deploy-Hub section and updates the table of contents; small markdown formatting fixes.

[Copilot]

-WhatIf is accepted by this script but ignored in -Remove mode, so Deploy-Hub -Remove -WhatIf <name> would still delete the resource group. Please honor -WhatIf during removal (for example, pass it through to Remove-AzResourceGroup or short-circuit deletion when -WhatIf is set) to avoid accidental deletions.

Suggested change

	Write-Host "Deleting resource group '$rgName'..."
	Remove-AzResourceGroup -Name $rgName -Force
	Write-Host "Deleted '$rgName'."
	if ($WhatIf)
	{
	# WhatIf mode: do not delete, just report the intended action
	Write-Host "WhatIf: would delete resource group '$rgName'."
	}
	else
	{
	Write-Host "Deleting resource group '$rgName'..."
	Remove-AzResourceGroup -Name $rgName -Force
	Write-Host "Deleted '$rgName'."
	}

[Copilot]

$groups may be $null (no matches) or a single PSResourceGroup object (1 match), in which case $groups.Count isn't reliable. Use a null/empty check (e.g., if (-not $groups) or @($groups).Count) so the "no resource groups found" path behaves correctly.

Suggested change

	if ($groups.Count -eq 0)
	if (-not $groups)

[Copilot]

This PR adds a new helper command. The repo release process states that new/updated functionality must be documented in docs-mslearn/toolkit/changelog.md; please add an entry under the next release section describing the new Deploy-Hub helper (customer-friendly, no internal implementation details).