Add Discord APKTool decompilation (Smali source for modding)

- Imported from https://github.com/supermegamestre/Project-Real-Resurrection-3
- APKTool decompilation (Smali bytecode) for modding and rebuilding APK
- Supports both 32-bit (armeabi-v7a) and 64-bit (arm64-v8a) architectures
- Includes full Smali source, resources, and native libraries
- Ready to rebuild APK after modifications with apktool b command
- Added comprehensive README-apktool.md with modding guide

This branch complements the JADX branches:
- Use JADX (main/discord-community) to UNDERSTAND code (readable Java)
- Use APKTool (this branch) to MODIFY and REBUILD APK (editable Smali)

Total: 44,417 files, 538.51 MB Smali source code

smali_classes2/com/google/android/datatransport/runtime/synchronization/SynchronizationException.smali

@@ -0,0 +1,14 @@
+.class public Lcom/google/android/datatransport/runtime/synchronization/SynchronizationException;
+.super Ljava/lang/RuntimeException;
+.source "SourceFile"
+
+
+# direct methods
+.method public constructor <init>(Ljava/lang/String;Ljava/lang/Throwable;)V
+    .locals 0
+
+    .line 20
+    invoke-direct {p0, p1, p2}, Ljava/lang/RuntimeException;-><init>(Ljava/lang/String;Ljava/lang/Throwable;)V
+
+    return-void
+.end method

smali_classes2/com/google/android/datatransport/runtime/synchronization/SynchronizationGuard$CriticalSection.smali

@@ -0,0 +1,19 @@
+.class public interface abstract Lcom/google/android/datatransport/runtime/synchronization/SynchronizationGuard$CriticalSection;
+.super Ljava/lang/Object;
+.source "SourceFile"
+
+
+# annotations
+.annotation system Ldalvik/annotation/EnclosingClass;
+    value = Lcom/google/android/datatransport/runtime/synchronization/SynchronizationGuard;
+.end annotation
+
+.annotation system Ldalvik/annotation/InnerClass;
+    accessFlags = 0x609
+    name = "CriticalSection"
+.end annotation
+
+
+# virtual methods
+.method public abstract execute()Ljava/lang/Object;
+.end method

smali_classes2/com/google/android/datatransport/runtime/synchronization/SynchronizationGuard.smali

@@ -0,0 +1,16 @@
+.class public interface abstract Lcom/google/android/datatransport/runtime/synchronization/SynchronizationGuard;
+.super Ljava/lang/Object;
+.source "SourceFile"
+
+
+# annotations
+.annotation system Ldalvik/annotation/MemberClasses;
+    value = {
+        Lcom/google/android/datatransport/runtime/synchronization/SynchronizationGuard$CriticalSection;
+    }
+.end annotation
+
+
+# virtual methods
+.method public abstract runCriticalSection(Lcom/google/android/datatransport/runtime/synchronization/SynchronizationGuard$CriticalSection;)Ljava/lang/Object;
+.end method