Document atlas_doc_format body as a serialized-JSON string

Clarify the -Body help for New-ConfluencePage, Update-ConfluencePage and Add-ConfluenceComment: the v2 API stores body.value as a string for every representation, and for atlas_doc_format the string is the ADF document serialized as JSON. The existing [string]\During review of #17, Copilot suggested that `Remove-ConfluenceLabel` add a `-Prefix` parameter (defaulting to `global`) and include it in the DELETE query.

The current behavior is correct for the common case: the v1 `DELETE /wiki/rest/api/content/{id}/label?name=<name>` endpoint defaults `prefix` to `global`, so removing a global label by name works. This is proven by the passing integration test in #17, which removes a label by name and then asserts it is no longer present on the page.

This issue tracks the optional enhancement of supporting non-`global` label prefixes (`my`, `team`, `system`) across the label cmdlets (`Add-ConfluenceLabel`, `Get-ConfluenceLabel`, `Remove-ConfluenceLabel`) by adding an optional `-Prefix` parameter, so labels with a non-default prefix can be managed. This is out of scope for #17, which delivers global-label management. handling is correct; this documents the expected input (review threads on atlas_doc_format handling).

Author: MariusStorhaug

src/functions/public/Comments/Add-ConfluenceComment.ps1

@@ -26,7 +26,9 @@ function Add-ConfluenceComment {
         [Parameter(Mandatory)]
         [string]$PageId,
 
-        # The comment body.
+        # The comment body, as a string in the chosen representation. For 'atlas_doc_format' pass
+        # the ADF document serialized as a JSON string (the v2 API stores body.value as a string
+        # for every representation).
         [Parameter(Mandatory)]
         [string]$Body,
 

src/functions/public/Pages/New-ConfluencePage.ps1

@@ -34,7 +34,9 @@ function New-ConfluencePage {
         # The ID of the parent page. Omit to create a top-level page.
         [string]$ParentId,
 
-        # The page body in the chosen representation. Defaults to empty.
+        # The page body, as a string in the chosen representation. For 'atlas_doc_format' pass
+        # the ADF document serialized as a JSON string - the v2 API stores body.value as a string
+        # for every representation. Defaults to empty.
         [string]$Body = '',
 
         # The body representation. Defaults to 'storage'.

src/functions/public/Pages/Update-ConfluencePage.ps1

@@ -32,7 +32,9 @@ function Update-ConfluencePage {
         # The new title. Defaults to the existing title.
         [string]$Title,
 
-        # The new body. Defaults to the existing body.
+        # The new body, as a string in the chosen representation. For 'atlas_doc_format' pass the
+        # ADF document serialized as a JSON string (the v2 API stores body.value as a string for
+        # every representation). Defaults to the existing body.
         [string]$Body,
 
         # The body representation. Defaults to 'storage'.