docs: update GuruScan README and module comments for current state

- README: remove AdwCleaner from scanner chain and exit code/licensing
  tables; add AdwCleaner note explaining why it is temporarily excluded;
  fix Headless description (WindowStyle=Hidden, not NoNewWindow); add
  GuruRMM integration section with example JSON output structure
- GuruScan.psm1: fix Headless param docstring; update whitelist comment
  (Emsisoft + HitmanPro only); remove C:\AdwCleaner from Defender
  exclusion list; fix Invoke-Remediation example (-Scanners Emsisoft,MSERT)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

projects/msp-tools/guru-scan/GuruScan.psm1

@@ -377,7 +377,8 @@ function Invoke-ScanPass {
     .PARAMETER TimeoutMinOverride
         If > 0, overrides the per-scanner timeout_min for all scanners.
     .PARAMETER Headless
-        When set, suppress scanner UI windows (NoNewWindow).
+        When set, launches scanner processes with WindowStyle=Hidden so no UI
+        windows appear. Use when dispatching from an RMM agent with no desktop.
     .OUTPUTS
         [System.Collections.Generic.List[pscustomobject]] of result objects.
     #>
@@ -771,7 +772,7 @@ function Invoke-GuruScan {
     )
 
     # Whitelist -- written to C:\GuruScan\whitelist.txt before any scanner runs.
-    # Emsisoft and HitmanPro honour this; RKill and AdwCleaner do not.
+    # Emsisoft (/wl=) and HitmanPro (/excludelist=) honour this; RKill does not.
     $whitelist = @('C:\GuruScan')
 
     # ForceRemove blacklist -- items removed after all scanners complete.
@@ -849,7 +850,7 @@ function Invoke-GuruScan {
 
     # Add Windows Defender exclusions for scanner paths so Defender does not
     # quarantine scanner EXEs or log files mid-run.
-    $defenderExclusions = @($script:Base, $script:LogRoot, 'C:\EmsisoftCmd', 'C:\AdwCleaner')
+    $defenderExclusions = @($script:Base, $script:LogRoot, 'C:\EmsisoftCmd')
     try {
         Add-MpPreference -ExclusionPath $defenderExclusions -ErrorAction SilentlyContinue
         Write-Host "[INFO] Windows Defender exclusions added for scanner paths" -ForegroundColor Cyan
@@ -1014,7 +1015,7 @@ function Invoke-Remediation {
         successfully are re-run.
     .EXAMPLE
         Invoke-Remediation -LogRoot "C:\ScanLogs\DESKTOP-20260523-143000"
-        Invoke-Remediation -LogRoot "C:\ScanLogs\DESKTOP-20260523-143000" -Scanners AdwCleaner,MSERT
+        Invoke-Remediation -LogRoot "C:\ScanLogs\DESKTOP-20260523-143000" -Scanners Emsisoft,MSERT
     #>
     [CmdletBinding()]
     param(