[common/logging] Simplify logging logic and fix issues when logging before system is created (#3688)

- our logging code was bigger than spdlog itself, why???? just keep it simple
- fix issues when logging before logging system is even started
- removes the "initialized logging twice" issue
- removes uneeded indirection in file logging
- uses direct formatting instead of jumping hoopla-around the fmt::format() ressult
- code duplication and dead code removal as usual

I did explore dup2() but I think it's not worth the hassle
I did try `fwopen()` but it's better if things are just kept as-is.

there is a lot of noise because I removed a bunch of redundant files on logging and just put everything in one file

now normally this wouldn't be a good idea, however consider: the complexity of logging; it's less than 500 lines... does it really need a whole subsystem?!?!?! ITS JUST LOGGING

Signed-off-by: lizzie <lizzie@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3688
Reviewed-by: crueter <crueter@eden-emu.dev>
Reviewed-by: DraVee <chimera@dravee.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

src/android/app/src/main/jni/android_config.cpp

@@ -2,7 +2,7 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 #include <common/fs/path_util.h>
-#include <common/logging/log.h>
+#include <common/logging.h>
 #include <common/settings.h>
 #include <input_common/main.h>
 #include "android_config.h"

src/android/app/src/main/jni/emu_window/emu_window.cpp

@@ -7,7 +7,7 @@
 #include <android/native_window_jni.h>
 
 #include "common/android/id_cache.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "input_common/drivers/android.h"
 #include "input_common/drivers/touch_screen.h"
 #include "input_common/drivers/virtual_amiibo.h"

src/android/app/src/main/jni/native.cpp

@@ -42,8 +42,7 @@
 #include "common/detached_tasks.h"
 #include "common/dynamic_library.h"
 #include "common/fs/path_util.h"
-#include "common/logging/backend.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/scm_rev.h"
 #include "common/scope_exit.h"
 #include "common/settings.h"

src/android/app/src/main/jni/native_config.cpp

@@ -10,7 +10,7 @@
 #include "common/android/android_common.h"
 #include "common/android/id_cache.h"
 #include "common/fs/path_util.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/settings.h"
 #include "frontend_common/config.h"
 #include "frontend_common/settings_generator.h"

src/android/app/src/main/jni/native_freedreno.cpp

@@ -23,7 +23,7 @@
 #include <jni.h>
 
 #include "common/android/android_common.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "native.h"
 
 namespace {

src/android/app/src/main/jni/native_log.cpp

@@ -1,8 +1,11 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <common/android/android_common.h>
-#include <common/logging/log.h>
+#include <common/logging.h>
 #include <jni.h>
 
 extern "C" {