Add native self-hosted instance connection to fluxer_desktop

Trimmed monorepo checkout (fluxer_desktop + packages/voice_engine_v2 +
tools/ci) with a "Connect to a Different Server" menu item and popout
that lets the desktop app switch to any self-hosted Fluxer instance,
plus fixes for well-known discovery on single-domain self-hosted
deployments and a false-positive ERR_ABORTED on same-origin client
redirects during the switch. Defaults to chat.fluxr.chat and uses an
isolated userData directory from the official build.

fluxer_desktop/native/win-game-capture/vulkan-layer/Cargo.toml

@@ -0,0 +1,31 @@
+[package]
+name = "fluxer_vulkan_layer"
+version = "0.0.0"
+edition = "2024"
+license = "AGPL-3.0-or-later"
+publish = false
+
+[workspace]
+resolver = "2"
+
+[lib]
+crate-type = ["cdylib"]
+
+[target.'cfg(target_os = "windows")'.dependencies]
+ash = {version = "0.38.0", default-features = false, features = ["std", "debug"]}
+ash-layer = "0.0.2"
+dashmap = "6.2.1"
+once_cell = "1.21.4"
+windows = {version = "0.62.2", features = [
+    "Win32_Foundation",
+    "Win32_Graphics_Direct3D",
+    "Win32_Graphics_Direct3D11",
+    "Win32_Graphics_Dxgi",
+    "Win32_Graphics_Dxgi_Common",
+]}
+windows-sys = {version = "0.61.2", features = [
+    "Win32_Foundation",
+    "Win32_System_Memory",
+    "Win32_System_Performance",
+    "Win32_System_Threading",
+]}