docs: add status badges (#12)

Author: ashishb

README.md

@@ -1,5 +1,11 @@
 # Android Malware Samples (Currently: 300 samples)
 
+[![Lint GitHub Actions](https://github.com/ashishb/android-malware/actions/workflows/lint-github-actions.yaml/badge.svg)](https://github.com/ashishb/android-malware/actions/workflows/lint-github-actions.yaml)
+
+[![Lint YAML](https://github.com/ashishb/android-malware/actions/workflows/lint-yaml.yaml/badge.svg)](https://github.com/ashishb/android-malware/actions/workflows/lint-yaml.yaml)
+[![Lint Markdown](https://github.com/ashishb/android-malware/actions/workflows/lint-markdown.yaml/badge.svg)](https://github.com/ashishb/android-malware/actions/workflows/lint-markdown.yaml)
+[![Lint Shell scripts](https://github.com/ashishb/android-malware/actions/workflows/lint-shell-script.yaml/badge.svg)](https://github.com/ashishb/android-malware/actions/workflows/lint-shell-script.yaml)
+
 1. Largest open collection of Android malware samples
 2. Live samples - use them at your peril
 3. Collected from several sources/mailing lists