Fix multi-subscription array interpolation in CreateBody

[jcoetsie]

Summary

Bug fix: multi-subscription array interpolation in CreateBody

• $Targetsubscription is declared as string[], so when two or more subscription IDs are passed, PowerShell's string interpolation joins them with a space inside a single "subscriptions/..." string — producing an invalid value that triggers an Azure InternalServerError from the checkZonePeers API.
• Fix: map each element individually with ForEach-Object so the JSON body contains a properly formatted array of "subscriptions/{id}" entries.

Before:

'subscriptionIds'= @(
    "subscriptions/$Targetsubscription"
)

After:

'subscriptionIds'= @($Targetsubscription | ForEach-Object { "subscriptions/$_" })

New feature: -Table switch for compact pivot table output

Adds an optional -Table switch that outputs results as a pivot table, resolving subscription IDs to their display names. Each row is a source AZ; each column is a target subscription:

  AZ mapping for location: westeurope

SourceAZ (My Source Sub) | Target Sub A | Target Sub B
--------------------------|--------------|-------------
1                         | 2            | 3
2                         | 1            | 2
3                         | 3            | 1

Subscription names are resolved via Get-AzSubscription and fall back to the raw ID if inaccessible. Without -Table, the original raw output is unchanged.

Test plan

• Run with a single -Targetsubscription — still works, raw output unchanged
• Run with two -Targetsubscription values — no longer returns InternalServerError
• Run with -Table — pivot table is displayed with resolved subscription names
• Run with -Table against a subscription the caller cannot read — falls back to subscription ID in column header

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