Add IMPROVEMENTS.md: onboarding suggestions by @sharkello

IMPROVEMENTS.md

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+Improvements suggested by @sharkello
+
+Summary
+-------
+Small, high‑impact changes to improve discoverability, onboarding, and first‑time contributor experience for the "android-reverse-engineering-skill" repository.
+
+Top items
+---------
+- Add a short TL;DR at the top of README with a one‑line quickstart (try in <5 minutes).
+- Provide a copy‑paste Getting Started (docker / single command / minimal example).
+- Add 1–3 small examples in an  folder showing the most common use cases.
+- Add a  template and 3 ready‑to‑assign small tasks to attract contributors.
+- Add CONTRIBUTING.md, CODE_OF_CONDUCT.md (short), and PR/Issue templates.
+- Add a lightweight CI workflow (syntax check / build) and a badge in README.
+
+Suggested "Good first issues"
+-----------------------------
+- "Add a minimal quickstart example" — add  with copy‑paste commands. Labels: , .
+- "Add CI badge" — enable a minimal GitHub Actions workflow and insert the badge into README. Labels: , .
+- "Polish README TL;DR" — shorten top of README to 3 lines and add a one‑command try it. Labels: , .
+
+Notes
+-----
+I can prepare the example files and open a PR with these changes if you want. For now I've created this IMPROVEMENTS.md and a branch: sharkello/improve-readme-20260417