feat(gui): limit search to a package (PR #2284)

* Add isDescendantOf and getJavaPackage helper functions

* Add i18n strings for search package

* Added search package to options in SearchSettings

* Add package limiting to each search provider

* Add package search to dialog and logic to get package by string.

* Added search option to package context menu

* Fix spotlessJavaCheck complaints

* Revert changes to individual search providers and add filter to base provider

jadx-core/src/main/java/jadx/api/JavaClass.java

@@ -252,6 +252,10 @@ public final class JavaClass implements JavaNode {
 		return cls.getPackage();
 	}
 
+	public JavaPackage getJavaPackage() {
+		return cls.getPackageNode().getJavaNode();
+	}
+
 	@Override
 	public JavaClass getDeclaringClass() {
 		return parent;

jadx-core/src/main/java/jadx/api/JavaPackage.java

@@ -76,6 +76,22 @@ public final class JavaPackage implements JavaNode, Comparable<JavaPackage> {
 		return !Objects.equals(parent, aliasParent);
 	}
 
+	public boolean isDescendantOf(JavaPackage ancestor) {
+		JavaPackage current = this;
+		while (current != null) {
+			if (ancestor.equals(current)) {
+				return true;
+			}
+
+			if (current.getPkgNode().getParentPkg() == null) {
+				current = null;
+			} else {
+				current = current.getPkgNode().getParentPkg().getJavaNode();
+			}
+		}
+		return false;
+	}
+
 	@Override
 	public ICodeNodeRef getCodeNodeRef() {
 		return pkgNode;