Windows: impl WindowsDisplay (#9287)

Tested on my laptop, and I've noticed that when I move the window,
`WindowsPlatform::displays()` is being continuously called. Is this
intended?

Release Notes:

- N/A

Cargo.lock

@@ -8729,6 +8729,12 @@ dependencies = [
  "digest 0.10.7",
 ]
 
+[[package]]
+name = "sha1_smol"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ae1a47186c03a32177042e55dbc5fd5aee900b8e0069a8d70fba96a9375cd012"
+
 [[package]]
 name = "sha2"
 version = "0.9.9"
@@ -11034,6 +11040,7 @@ checksum = "79daa5ed5740825c40b389c5e50312b9c86df53fccd33f281df655642b43869d"
 dependencies = [
  "getrandom 0.2.10",
  "serde",
+ "sha1_smol",
 ]
 
 [[package]]