Add agent knowledge files for all modules

packages/shared-splitscreen/.agent/memory.md

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+# @manacore/shared-splitscreen Memory
+
+## Changelog
+
+### Recent Changes
+- No changes recorded yet
+
+## Common Issues & Solutions
+
+### Issue Template
+**Problem**:
+**Solution**:
+**Date**:
+
+## Patterns & Learnings
+
+### Split-Screen Patterns
+- No patterns documented yet
+
+### State Management Patterns
+- No patterns documented yet
+
+## Technical Decisions
+
+### Decision Template
+**Decision**:
+**Reason**:
+**Date**:
+**Impact**:
+
+## Notes
+
+- This memory file is maintained by agents working on @manacore/shared-splitscreen
+- Add significant changes, decisions, and learnings here
+- Document common split-screen use cases
+- Note cross-app communication patterns
+- Track performance optimizations for iFrame loading