refactor separate framework from game code, add demo3d

demo3d/server/Cargo.toml

@@ -0,0 +1,40 @@
+[package]
+name = "demo3d-server"
+version = "0.1.0"
+edition = "2024"
+
+[lib]
+name = "demo3d_server"
+
+[build-dependencies]
+bindgen = "0.72"
+cc = "1.2"
+
+[dependencies]
+libc = { version = "0.2", default-features = false }
+libm = { version = "0.2", default-features = false }
+
+[target.'cfg(windows)'.dependencies]
+windows-sys = { version = "0.61", default-features = false, features = [
+    "Win32_System_Memory",
+    "Win32_System_Performance",
+    "Win32_System_Threading",
+    "Win32_Networking_WinSock",
+] }
+
+[[bin]]
+name = "demo3d-server"
+path = "src/main.rs"
+
+[profile.dev]
+opt-level = 2
+panic = "abort"
+
+[profile.dev.package."*"]
+opt-level = 3
+
+[profile.release]
+panic = "abort"
+lto = true
+codegen-units = 1
+strip = true