chore: initial project scaffold with BMAD tooling

CLAUDE.md

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+# pictureFrame
+
+*Project description goes here.*
+
+## Project goal
+
+*What does this project do and why?*
+
+## Stack
+
+*Languages, frameworks, key libraries.*
+
+## Hardware
+
+*If applicable — describe the target hardware.*
+
+## Design decisions
+
+*Key architectural or UX choices.*
+
+## Full spec
+
+*Link to or describe the full specification.*