packaging: include `windows-curses` on Windows

Otherwise the interface degrades to the old hunk selection method on Windows
when `ui.tweakdefaults=1`.  I've been using this for a couple of months without
any issues, other than it seems to toggle off edit mode for the terminal when
run through MSYS.  Using cmd.exe seems to work fine.

Differential Revision: https://phab.mercurial-scm.org/D9805

contrib/packaging/requirements-windows-py2.txt

@@ -45,3 +45,15 b' urllib3==1.25.11 \\'
     --hash=sha256:8d7eaa5a82a1cac232164990f04874c594c9453ec55eef02eab885aa02fc17a2 \
     --hash=sha256:f5321fbe4bf3fefa0efd0bfe7fb14e90909eb62a48ccda331726b4319897dd5e \
     # via dulwich
+windows-curses==2.1.0 \
+    --hash=sha256:261fde5680d1ce4ce116908996b9a3cfb0ffb03ea68d42240f62b56a9fa6af2c \
+    --hash=sha256:66034dc9a705d87308cc9ea90836f4ee60008a1d5e2c1d34ace627f60268158b \
+    --hash=sha256:669caad3ae16faf2d201d7ab3b8af418a2fd074d8a39d60ca26f3acb34b6afe5 \
+    --hash=sha256:73bd3eebccfda55330783f165151de115bfa238d1332f0b2e224b550d6187840 \
+    --hash=sha256:89a6d973f88cfe49b41ea80164dcbec209d296e0cec34a02002578b0bf464a64 \
+    --hash=sha256:8ba7c000d7ffa5452bbd0966b96e69261e4f117ebe510aeb8771a9650197b7f0 \
+    --hash=sha256:97084c6b37b1534f6a28a514d521dfae402f77dcbad42b14ee32e8d5bdc13648 \
+    --hash=sha256:9e474a181f96d60429a4766145628264e60b72e7715876f9135aeb2e842f9433 \
+    --hash=sha256:cfe64c30807c146ef8d094412f90f2a2c81ad6aefff3ebfe8e37aabe2f801303 \
+    --hash=sha256:ff8c67f74b88944d99fa9d22971c05c335bc74f149120f0a69340c2c3a595497 \
+    # via -r contrib/packaging/requirements-windows.txt.in

contrib/packaging/requirements-windows-py3.txt

@@ -110,6 +110,16 b' urllib3==1.25.11 \\'
     --hash=sha256:8d7eaa5a82a1cac232164990f04874c594c9453ec55eef02eab885aa02fc17a2 \
     --hash=sha256:f5321fbe4bf3fefa0efd0bfe7fb14e90909eb62a48ccda331726b4319897dd5e \
     # via dulwich
+windows-curses==2.2.0 \
+    --hash=sha256:1452d771ec6f9b3fef037da2b169196a9a12be4e86a6c27dd579adac70c42028 \
+    --hash=sha256:267544e4f60c09af6505e50a69d7f01d7f8a281cf4bd4fc7efc3b32b9a4ef64e \
+    --hash=sha256:389228a3df556102e72450f599283094168aa82eee189f501ad9f131a0fc92e1 \
+    --hash=sha256:84336fe470fa07288daec5c684dec74c0766fec6b3511ccedb4c494804acfbb7 \
+    --hash=sha256:9aa6ff60be76f5de696dc6dbf7897e3b1e6abcf4c0f741e9a0ee22cd6ef382f8 \
+    --hash=sha256:c4a8ce00e82635f06648cc40d99f470be4e3ffeb84f9f7ae9d6a4f68ec6361e7 \
+    --hash=sha256:c5cd032bc7d0f03224ab55c925059d98e81795098d59bbd10f7d05c7ea9677ce \
+    --hash=sha256:fc0be372fe6da3c39d7093154ce029115a927bf287f34b4c615e2b3f8c23dfaa \
+    # via -r contrib/packaging/requirements-windows.txt.in
 zipp==3.4.0 \
     --hash=sha256:102c24ef8f171fd729d46599845e95c7ab894a4cf45f5de11a44cc7444fb1108 \
     --hash=sha256:ed5eee1974372595f9e416cc7bbeeb12335201d8081ca8a0743c954d4446e5cb \

contrib/packaging/requirements-windows.txt.in

@@ -8,3 +8,4 b' pygments'
 # Need to list explicitly so dependency gets pulled in when
 # not running on Windows.
 pywin32-ctypes
+windows-curses