Use here-strings for JSON in Compile.ps1 (#2816)

* Use here-strings for JSON in Compile.ps1

- Change Compile.ps1 to use here-strings with JSON, similar to my changes to Xaml being ingested using here-strings.

* Slight changes.

- Modifications, allowing for the removal of all .replace() functions in JSON handler.
- Changed formatting of here-string on line 91 -> 89 to prevent accidental double in winutil.ps1 (Doesn't cause an issue, but looks better.)
- Added here-string to 95 -> 93 (This allowed the removal of the final .replace())

* Added comment.

- Added comment to line 90.

Compile.ps1

@@ -73,8 +73,8 @@ Get-ChildItem "functions" -Recurse -File | ForEach-Object {
     }
 Update-Progress "Adding: Config *.json" 40
 Get-ChildItem "config" | Where-Object {$psitem.extension -eq ".json"} | ForEach-Object {
-    $json = (Get-Content $psitem.FullName).replace("'","''")
-    $jsonAsObject = $json | convertfrom-json
+    $json = (Get-Content $psitem.FullName -Raw)
+    $jsonAsObject = $json | ConvertFrom-Json
 
     # Add 'WPFInstall' as a prefix to every entry-name in 'applications.json' file
     if ($psitem.Name -eq "applications.json") {
@@ -85,12 +85,13 @@ Get-ChildItem "config" | Where-Object {$psitem.extension -eq ".json"} | ForEach-
         }
     }
 
-    # The replace at the end is required, as without it the output of 'converto-json' will be somewhat weird for Multiline Strings
-    # Most Notably is the scripts in some json files, making it harder for users who want to review these scripts, which're found in the compiled script
-    $json = ($jsonAsObject | convertto-json -Depth 3).replace('\r\n',"`r`n")
+    # Line 90 requires no whitespace inside the here-strings, to keep formatting of the JSON in the final script.
+    $json = @"
+$($jsonAsObject | ConvertTo-Json -Depth 3)
+"@
 
-    $sync.configs.$($psitem.BaseName) = $json | convertfrom-json
-    $script_content.Add($(Write-output "`$sync.configs.$($psitem.BaseName) = '$json' `| convertfrom-json" ))
+    $sync.configs.$($psitem.BaseName) = $json | ConvertFrom-Json
+    $script_content.Add($(Write-Output "`$sync.configs.$($psitem.BaseName) = @'`n$json`n'@ `| ConvertFrom-Json" ))
 }
 
 # Read the entire XAML file as a single string, preserving line breaks