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).

src/config.rs

@@ -84,7 +84,9 @@ impl GameProfile {
             }
             for l in &self.prefix_links {
                 if l.link.trim().is_empty() || l.target.trim().is_empty() {
-                    return Err("Game profile has a prefix link with an empty link or target.".into());
+                    return Err(
+                        "Game profile has a prefix link with an empty link or target.".into(),
+                    );
                 }
                 if std::path::Path::new(&l.link).is_absolute() {
                     return Err(format!(
@@ -120,7 +122,8 @@ pub struct LauncherConfig {
     pub bridge_tls_enabled: bool,
     /// Path to the built openfut_hook.dll (Windows DLL for Proton injection).
     pub hook_dll_path: String,
-    /// FIFA 23 game folder inside the Proton prefix (where the DLL is deployed).
+    /// Game folder where the hook DLL (version.dll) is deployed. Empty means
+    /// "not configured" — the hook deploy/check is skipped until the user sets it.
     pub fifa_game_dir: String,
     /// The OpenFUT server FIFA's EA traffic is redirected to. IPv4 literal or
     /// hostname. Empty means "not configured" — launching is blocked until set.
@@ -235,11 +238,9 @@ impl Default for LauncherConfig {
                 .unwrap_or_default()
                 .to_string_lossy()
                 .into(),
-            fifa_game_dir: dirs::home_dir()
-                .map(|h| h.join(".steam/steam/steamapps/common/FIFA 23"))
-                .unwrap_or_default()
-                .to_string_lossy()
-                .into(),
+            // Empty by default, like the server host and game profile: the
+            // launcher never invents a path to somebody's game install.
+            fifa_game_dir: String::new(),
             // No server configured by default — the user MUST enter one. There
             // is deliberately no loopback/localhost default.
             openfut_server_host: String::new(),

src/setup.rs

@@ -70,13 +70,13 @@ pub(crate) fn run_elevated(script: &str) -> anyhow::Result<()> {
 /// The file the injected hook reads its server address from, in the game dir.
 pub const HOOK_CFG_FILE: &str = "openfut.cfg";
 
-/// Deploy openfut_hook.dll into the FIFA 23 game directory and write
-/// openfut.cfg with the structured server configuration the hook reads.
-/// `cfg_contents` must be the full `openfut.cfg` body (see
-/// `LauncherConfig::hook_cfg_contents`) — this function does not invent any
-/// address itself, so a missing server can never silently become loopback.
-/// Uses `version.dll` as the hijack name — FIFA 23 loads it but defers to
-/// the system copy, so Proton picks up our local one first.
+/// Deploy openfut_hook.dll into the game directory and write openfut.cfg with the
+/// structured server configuration the hook reads. `cfg_contents` must be the full
+/// `openfut.cfg` body (see `LauncherConfig::hook_cfg_contents`) — this function
+/// does not invent any address itself, so a missing server can never silently
+/// become loopback. Uses `version.dll` as the hijack name: the game loads it but
+/// defers to the system copy, so the loader (native or Wine) picks up our local
+/// one first.
 pub fn deploy_hook_dll(dll_src: &Path, game_dir: &Path, cfg_contents: &str) -> anyhow::Result<()> {
     if !dll_src.exists() {
         anyhow::bail!(