Windows: no console, app icons, Calc tiles paint, theme switch no edit

Release apps use the GUI subsystem; workers, Git and cmd start with
CREATE_NO_WINDOW. Each exe embeds its icon as resource 1, which gpui
also loads for the window. Patch 0044: Win32 devices take no client
buffer, so tiles and slide layers paint at full size, then copy.
ely.xcd gives both schemes one notes colour: Calc rewrote the comment
style on each switch and left an undo step. lo-patches.sh keeps LF.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

crates/ely-pdf-engine/src/client.rs

@@ -103,7 +103,7 @@ impl Worker {
 
     /// Spawns `bin`; one from other sources is refused.
     pub fn spawn_from(bin: &Path) -> io::Result<Self> {
-        let mut child = Command::new(bin)
+        let mut child = ely_ipc::windowless(&mut Command::new(bin))
             .stdin(Stdio::piped())
             .stdout(Stdio::piped())
             .stderr(Stdio::piped())