Introduce .cursor/skills/android-reverse-engineering for Cursor IDE, document
cross-platform setup in README and setup-guide, and add missing PS1 scripts
(fingerprint, Kotlin name recovery, lookup). Extract shared Python modules
used by bash and PowerShell wrappers; harden decompile.ps1 for XAPK extraction,
partial jadx/Fernflower success, and Fernflower timeouts.
Rafael Steil