chore(script): add example for rename method param from annotation (#2004)

jadx-plugins/jadx-script/examples/scripts/deobf/deobf_method_param.jadx.kts

@@ -0,0 +1,34 @@
+/**
+ * Rename method parameters from value in attached annotation
+ */
+
+import jadx.api.plugins.input.data.attributes.JadxAttrType
+import jadx.core.deobf.NameMapper
+import jadx.core.dex.nodes.MethodNode
+import jadx.plugins.script.runtime.data.ScriptDecompilePass
+
+val annCls = "Lretrofit2/http/Query;"
+val annParam = "value"
+
+val jadx = getJadxInstance()
+
+// access to method parameters variables available only in decompile passes
+jadx.addPass(object : ScriptDecompilePass(jadx, "RenameParams") {
+	override fun visit(mth: MethodNode) {
+		// parameter annotations stored in method attribute
+		mth.get(JadxAttrType.ANNOTATION_MTH_PARAMETERS)?.let { paramsAttr ->
+			for ((paramNum, annAttr) in paramsAttr.paramList.withIndex()) {
+				val name = annAttr.get(annCls)?.values?.get(annParam)?.value as String
+				if (NameMapper.isValidIdentifier(name)) {
+					mth.argRegs[paramNum].name = name
+					log.info { "Rename param $paramNum to $name in method $mth" }
+				}
+			}
+		}
+	}
+})
+
+jadx.afterLoad {
+	// force decompilation and run rename pass for all classes (optional)
+	jadx.decompile.allThreaded()
+}