refactor(launcher): retire FIFA 23; keep the hook game-generic by feature

FIFA 23 is not in development and was never a valid template for FIFA 17
(different game, different in-memory layout). Remove it as a build target and
as scaffolding, while preserving the per-game feature architecture so future
games plug in as new modules — never by copying retired reverse-engineering.

Hook (openfut-hook):
- Delete install_hooks_fifa23 and every FIFA23-only module: config, hooks,
  transport_watch, ssl_patch, origin_spy, tls_bypass, dial_notification, probe
  (+ probe feature), recv_hook (+ capture_baseline feature), plus the orphan
  FIFA23 LSX/Origin files lsx.rs and ea_stub.rs. ~3.6k lines; git + Vault retain
  the research.
- lib.rs is now game-generic: a per-game feature selects that game's module and
  install_hooks dispatches to it. No game feature => compile_error!("select a
  game, e.g. --features fifa17"). --features fifa17 remains the build invariant.
- Drop the crate-wide  blanket (it existed only
  to hide the compiled-but-unused FIFA23 modules). Replace with narrow, justified
  #[allow(dead_code)] on the three FIFA17 SBC RE-scaffolding items it was masking,
  so the candidate stays behavior-identical.
- connect_hook: the redirect is now always the config-driven path (openfut-common
  target from openfut.cfg); the hardcoded-loopback rewrite and its dead consts are
  gone. Removed the FIFA23-era transport_watch diagnostics from the shared
  connect/WSAConnect/ConnectEx detours. Deleted unused iat::patch_iat_in.

Launcher:
- fifa_game_dir no longer defaults to a hardcoded '.../FIFA 23' Steam path; it is
  empty by default, matching the launcher's own rule that it never invents a path
  to somebody's game install (like openfut_server_host and game_profile).
- Generalise the remaining 'FIFA 23' doc literals in config.rs / setup.rs.

Proof: fifa17 clippy -D warnings clean; no-game build fails with the documented
compile_error; launcher 75 tests pass unchanged; launcher + hook cross-build
x86_64-pc-windows-gnu; cargo fmt --check clean; zero FIFA23 symbols/literals
remain. FIFA17 armed-module set unchanged (redirect + SBC/store/season).

openfut-hook/src/iat.rs

@@ -71,19 +71,6 @@ pub unsafe fn patch_iat(original_fn: *const (), hook_fn: *const ()) -> usize {
     patch_module(module, original_fn, hook_fn)
 }
 
-/// Patch the IAT of a specific already-loaded DLL (e.g. b"EAWebKit.dll\0").
-pub unsafe fn patch_iat_in(
-    module_name: &[u8],
-    original_fn: *const (),
-    hook_fn: *const (),
-) -> usize {
-    let module = GetModuleHandleA(module_name.as_ptr());
-    if module.is_null() {
-        return 0;
-    }
-    patch_module(module, original_fn, hook_fn)
-}
-
 unsafe fn patch_module(module: HMODULE, original_fn: *const (), hook_fn: *const ()) -> usize {
     if module.is_null() {
         return 0;