Fix broken CroppedPage.annots/hyperlinks

Issue was caused by missing `.initial_doctop` and `.rotation`
properties. h/t @Safrone in #1171

pdfplumber/page.py

@@ -633,6 +633,8 @@ def __init__(self, parent_page: Page):
         self.pdf = parent_page.pdf
         self.page_obj = parent_page.page_obj
         self.page_number = parent_page.page_number
+        self.initial_doctop = parent_page.initial_doctop
+        self.rotation = parent_page.rotation
         self.mediabox = parent_page.mediabox
         self.cropbox = parent_page.cropbox
         self.flush_cache(Container.cached_properties)

tests/test_basics.py

@@ -59,6 +59,16 @@ def test_annots(self):
         with pdfplumber.open(path) as pdf:
             assert len(pdf.annots)
 
+    def test_annots_cropped(self):
+        pdf = self.pdf_2
+        page = pdf.pages[0]
+        assert len(page.annots) == 13
+        assert len(page.hyperlinks) == 1
+
+        cropped = page.crop(page.bbox)
+        assert len(cropped.annots) == 13
+        assert len(cropped.hyperlinks) == 1
+
     def test_annots_rotated(self):
         def get_annot(filename, n=0):
             path = os.path.join(HERE, "pdfs", filename)