misc: various clean up for diagnosing launch failures (#872)

## Link to GitHub Issue or related Pull Request, if one exists
#345 

## Description of change

**IIDX TDJ rom probe no longer touches removable media** —
`C:\000rom.txt` and `D:\001rom.txt` are not emulated paths; they hit
whatever is actually mounted on the user's machine. `D:` is commonly an
optical drive or card reader, and the launcher clears
`SEM_FAILCRITICALERRORS` process-wide before attach, so an empty drive
raises the modal *"insert a disk"* dialog and blocks the attaching
thread. The probe now checks `GetDriveTypeW` and only reads fixed and
RAM disks.

**`iat_find` no longer calls `log_fatal` on an unparseable module** —
`iat_try(nullptr)` walks every loaded module, including foreign ones
(injected, manually mapped, header wiped by AV/EDR/overlays). A non-`MZ`
DOS header called `log_fatal`. There is nothing to hook in such a
module, so it is skipped.

**`logger::stop()` can no longer hang forever** — hook installation
suspends every other thread, including the logging thread. `stop()`
unconditionally joined that thread, so `log_fatal` and the 30-second
`show_popup` watchdog both wedged instead of terminating, and logging is
asynchronous so nothing reached log.txt either. It now waits with a
timeout, then detaches and flushes synchronously.

**`GetFileSizeEx` was never hooked** — the hook was registered under the
name `"GetFileSize"`, so it re-patched that slot instead.

**Warn when `-modules` is set** — it changes where the game is run from,
and is usually set accidentally.

## Testing
*how was the code tested?*

src/spice2x/launcher/launcher.cpp

@@ -1683,6 +1683,26 @@ int main_implementation(int argc, char *argv[]) {
             });
     }
 
+    if (options[launcher::Options::PathToModules].is_active() && !cfg::CONFIGURATOR_STANDALONE) {
+        log_warning(
+            "launcher",
+            "WARNING - user specified -modules option\n\n\n"
+            "!!!                                                             !!!\n"
+            "!!! Using -modules changes which game DLLs get loaded!          !!!\n"
+            "!!! Unless you know exactly what you are doing, clear -modules  !!!\n"
+            "!!!   and try again; usually this is accidentally set by users  !!!\n"
+            "!!!   without understanding the implications.                   !!!\n"
+            "!!!                                                             !!!\n"
+            );
+        deferredlogs::defer_error_messages({
+            "-modules option specified by user",
+            "    game DLLs and patches are loaded from that folder instead of the spice folder,",
+            "    and it is also prepended to the DLL search path, so dependencies may resolve to",
+            "    unexpected copies; instead, clear -modules option and place spice binaries in",
+            "    the intended game directory",
+            });
+    }
+
     if (launcher::signal::DISABLE && !cfg::CONFIGURATOR_STANDALONE) {
         log_warning(
             "launcher",