feat(license): migrate to Apache 2.0 with contributor attribution

- Change license from MIT to Apache 2.0
- Add NOTICE file with full contributor list
- Add automated workflow to keep NOTICE updated weekly
- Update README with Apache 2.0 badge and contributors badge
- Credit author: Argenis Delarosa (theonlyhennygod)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

NOTICE

@@ -0,0 +1,47 @@
+ZeroClaw
+Copyright 2025-2026 Argenis Delarosa
+
+This product includes software developed by ZeroClaw Labs and its contributors.
+
+Author
+======
+theonlyhennygod (Argenis Delarosa)
+
+Contributors
+============
+
+The following individuals have contributed to ZeroClaw:
+
+- Abdzsam
+- adie
+- agorevski
+- cd-slash
+- chumyin
+- ecschoye
+- elonfeng
+- Extreammouse
+- fettpl
+- haeli05
+- jereanon
+- junbaor
+- kumanday
+- lawyered0
+- mai1015
+- Mgrsc
+- Moeblack
+- radkrish
+- reidliu41
+- sahajre
+- stakeswky
+- theonlyhennygod
+- vernonstinebaker
+- vrescobar
+- willsarg
+
+Third-Party Dependencies
+========================
+
+This project uses the following third-party libraries and components,
+each licensed under their respective terms:
+
+See Cargo.lock for a complete list of dependencies and their licenses.