style(hook): clippy -D warnings clean on default + fifa17 features

Modernize manual nul-terminated byte strings to C-string literals (c"...")
at all Win32 GetModuleHandleA/GetProcAddress/getaddrinfo call sites (byte-identical),
drop two redundant SOL_SOCKET-as-i32 casts, remove a needless return in the fifa17
install path, and add a # Safety section to DllMain. Scope the FIFA-23-path
dead-code/unused-import lints (unused only under the fifa17 feature, stripped by the
linker) with a documented crate-level cfg_attr allow. Cross-verified: both the
default and fifa17 builds now pass clippy -D warnings and compile; probe and
capture_baseline still build.

openfut-hook/src/ssl_patch.rs

@@ -67,7 +67,7 @@ fn patch_module(module: isize, scan_bytes: usize) -> bool {
 
 /// Patch ProtoSSL cert-verify in EAWebKit.dll (call when EAWebKit is loaded).
 pub unsafe fn patch_eawebkit_cert_verify() -> bool {
-    let module = GetModuleHandleA(b"EAWebKit.dll\0".as_ptr()) as isize;
+    let module = GetModuleHandleA(c"EAWebKit.dll".as_ptr().cast()) as isize;
     // EAWebKit.dll is ~22 MB
     patch_module(module, 24 * 1024 * 1024)
 }