Update Jamf API endpoints (#39146)

Discussed at
https://macadmins.slack.com/archives/C0214NELAE7/p1769719765777279
- The endpoints for marking a device as unmanaged and sending an
unmanage command were deprecated and no longer work. The endpoint for
looking up a device by serial number was also deprecated, so I've
proactively updated it.
- The whole story is now refactored and simplified.
- Also fixed a link in the `tines` README.

docs/solutions/macos/scripts/remove-jamf.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+# This script runs one last recon and then removes the Jamf framework.
+# Must be run as root. Deploy with Fleet, NOT Jamf Pro.
+
+if [ "$(id -u)" -ne 0 ]; then
+    echo "This script must be run as root." >&2
+    exit 1
+fi
+
+jamf_binary=$(command -v jamf)
+
+if [ -z "$jamf_binary" ]; then
+    for path in "/usr/local/bin/jamf" "/usr/local/jamf/bin/jamf" "/usr/sbin/jamf"; do
+        if [ -x "$path" ]; then
+            jamf_binary="$path"
+            break
+        fi
+    done
+fi
+
+if [ -z "$jamf_binary" ]; then
+    echo "Jamf binary not found. Exiting." >&2
+    exit 1
+fi
+
+echo "Jamf binary found at: $jamf_binary"
+
+echo "Running final inventory update..."
+$jamf_binary recon || echo "Warning: recon command failed (continuing anyway)"
+
+echo "Removing Jamf framework..."
+if $jamf_binary removeFramework; then
+    echo "Jamf removal successful!"
+else
+    echo "Error: removeFramework command failed." >&2
+    exit 1
+fi