Add read.ico as windows exe icon resource

Cargo.toml

@@ -3,6 +3,10 @@ name = "epub-read"
 version = "0.1.0"
 edition = "2021"
 description = "ePub reader with egui"
+build = "build.rs"
+
+[build-dependencies]
+embed-resource = "2.4"
 
 [[bin]]
 name = "epub-read"

build.rs

@@ -0,0 +1,7 @@
+#[cfg(target_os = "windows")]
+fn main() {
+    embed_resource::compile("read.rc", embed_resource::NONE);
+}
+
+#[cfg(not(target_os = "windows"))]
+fn main() {}

read.rc

@@ -0,0 +1 @@
+1 ICON "read.ico"