feat(runtime): add native office preview and download plugin

image/office-worker.py

@@ -0,0 +1,10 @@
+"""Apply process limits before executing a trusted conversion helper."""
+import os
+import resource
+import sys
+
+memory, file_bytes, *command = sys.argv[1:]
+resource.setrlimit(resource.RLIMIT_AS, (int(memory), int(memory)))
+resource.setrlimit(resource.RLIMIT_FSIZE, (int(file_bytes), int(file_bytes)))
+resource.setrlimit(resource.RLIMIT_CORE, (0, 0))
+os.execv(command[0], command)