feat: Update version to 3.0.2 and add default footer elements for portal settings

deployment/add-custombranding.ps1

@@ -39,6 +39,22 @@ $componentName = 'CustomBranding'
 $componentTitle = 'Custom Branding Application Customizer'
 $classicActionName = 'CustomBranding.Classic.ScriptLink'
 
+function New-DefaultFooterElements {
+    return @(@{
+        type = 'div'
+        attributes = @{ role = 'contentinfo'; 'aria-label' = 'Portalverwaltung' }
+        styles = @{
+            'background-color' = '#323130'; color = '#ffffff'; padding = '12px 16px'
+            'text-align' = 'center'; width = '100%'; 'box-sizing' = 'border-box'
+        }
+        children = @(@{
+            type = 'a'; content = 'Portal Settings'
+            attributes = @{ href = '~sitecollection/SitePages/PortalSettings.aspx' }
+            styles = @{ color = '#ffffff'; 'text-decoration' = 'underline' }
+        })
+    })
+}
+
 function New-DefaultCustomBrandingConfiguration {
     return @{
         schemaVersion = 2
@@ -52,7 +68,7 @@ function New-DefaultCustomBrandingConfiguration {
         allowedCssHosts = @()
         cssfiles = @()
         placeholdertop = @{ elements = @() }
-        placeholderbottom = @{ elements = @() }
+        placeholderbottom = @{ elements = @(New-DefaultFooterElements) }
     }
 }
 
@@ -133,7 +149,9 @@ try {
         minimumPortalSettingsVersion = '3.0.0'
     }
     if (-not $configuration.ContainsKey('placeholdertop')) { $configuration.placeholdertop = @{ elements = @() } }
-    if (-not $configuration.ContainsKey('placeholderbottom')) { $configuration.placeholderbottom = @{ elements = @() } }
+    if (-not $configuration.ContainsKey('placeholderbottom')) {
+        $configuration.placeholderbottom = @{ elements = @(New-DefaultFooterElements) }
+    }
     if (-not $configuration.ContainsKey('cssfiles')) { $configuration.cssfiles = @() }
     if (-not $configuration.ContainsKey('allowedCssHosts')) { $configuration.allowedCssHosts = @() }
     if ($PSBoundParameters.ContainsKey('EnableDebug')) { $configuration.debug = [bool]$EnableDebug.IsPresent }