Phase 2: Performance Profiling Setup - Add profiling utilities

- Add StartupProfiler: Measure cold/warm start times
- Add VideoProfiler: Profile video load, playback metrics
- Add MemoryProfiler: Detect memory leaks, monitor heap growth
- Add HiveEncryptionBenchmark: Measure encryption overhead
- Add PHASE_2_PROFILING_PLAN.md: Complete testing procedures

Ready for profiling execution once Flutter SDK is initialized

_bmad/bmm/4-implementation/bmad-quick-dev/SKILL.md

@@ -0,0 +1,6 @@
+---
+name: bmad-quick-dev
+description: 'Implements any user intent, requirement, story, bug fix or change request by producing clean working code artifacts that follow the project''s existing architecture, patterns and conventions. Use when the user wants to build, fix, tweak, refactor, add or modify any code, component or feature.'
+---
+
+Follow the instructions in ./workflow.md.