Enable GIF support for ZoomIt (#43266)

Closes #43265

.github/actions/spell-check/expect.txt

@@ -66,6 +66,7 @@ APIIs
 Apm
 APPBARDATA
 APPEXECLINK
+appext
 APPLICATIONFRAMEHOST
 appmanifest
 APPMODEL
@@ -187,6 +188,7 @@ CAPTUREBLT
 CAPTURECHANGED
 CARETBLINKING
 CAtl
+CBN
 cch
 CCHDEVICENAME
 CCHFORMNAME
@@ -414,6 +416,9 @@ DNLEN
 DONOTROUND
 DONTVALIDATEPATH
 dotnet
+downsampled
+downsampling
+Downsampled
 downscale
 DPICHANGED
 DPIs
@@ -598,6 +603,7 @@ getfilesiginforedist
 geolocator
 GETHOTKEY
 GETICON
+GETLBTEXT
 GETMINMAXINFO
 GETNONCLIENTMETRICS
 GETPROPERTYSTOREFLAGS
@@ -605,6 +611,7 @@ GETSCREENSAVERRUNNING
 GETSECKEY
 GETSTICKYKEYS
 GETTEXTLENGTH
+GIFs
 gitmodules
 GHND
 GMEM
@@ -615,6 +622,7 @@ GPOCA
 gpp
 gpu
 gradians
+grctlext
 Gridcustomlayout
 GSM
 gtm