jadx: add page (#7491)

pages/common/jadx.md

@@ -0,0 +1,13 @@
+# jadx
+
+> Dex to Java decompiler.
+> Produces Java source code from Android Dex and APK files.
+> More information: <https://github.com/skylot/jadx>.
+
+- Decompile a Dex file into a directory:
+
+`jadx {{path/to/file}}`
+
+- Decompile a Dex file into a specific directory:
+
+`jadx --output-dir {{path/to/directory}} {{path/to/file}}`