feat: impl ezpdf decrypter

main.py

@@ -0,0 +1,20 @@
+from pypdf import PdfWriter
+from pypdf.generic import IndirectObject
+
+from src.pdf import EZPdfReader
+
+reader = EZPdfReader("test.ezpdf")
+
+for gen, entries in reader.xref.items():
+    if gen == 65535:
+        continue
+    for objid in list(entries.keys()):
+        reader.get_object(IndirectObject(objid, gen, reader))
+for objid in list(reader.xref_objStm.keys()):
+    reader.get_object(IndirectObject(objid, 0, reader))
+
+writer = PdfWriter()
+writer.clone_document_from_reader(reader)  # clones root pages etc
+
+with open("out.pdf", "wb") as f:
+    writer.write(f)