feat: Complete Rust port of WiFi-DensePose with modular crates

Major changes:
- Organized Python v1 implementation into v1/ subdirectory
- Created Rust workspace with 9 modular crates:
  - wifi-densepose-core: Core types, traits, errors
  - wifi-densepose-signal: CSI processing, phase sanitization, FFT
  - wifi-densepose-nn: Neural network inference (ONNX/Candle/tch)
  - wifi-densepose-api: Axum-based REST/WebSocket API
  - wifi-densepose-db: SQLx database layer
  - wifi-densepose-config: Configuration management
  - wifi-densepose-hardware: Hardware abstraction
  - wifi-densepose-wasm: WebAssembly bindings
  - wifi-densepose-cli: Command-line interface

Documentation:
- ADR-001: Workspace structure
- ADR-002: Signal processing library selection
- ADR-003: Neural network inference strategy
- DDD domain model with bounded contexts

Testing:
- 69 tests passing across all crates
- Signal processing: 45 tests
- Neural networks: 21 tests
- Core: 3 doc tests

Performance targets:
- 10x faster CSI processing (~0.5ms vs ~5ms)
- 5x lower memory usage (~100MB vs ~500MB)
- WASM support for browser deployment

.claude/commands/github/pr-enhance.md

@@ -0,0 +1,26 @@
+# pr-enhance
+
+AI-powered pull request enhancements.
+
+## Usage
+```bash
+npx claude-flow github pr-enhance [options]
+```
+
+## Options
+- `--pr-number <n>` - Pull request number
+- `--add-tests` - Add missing tests
+- `--improve-docs` - Improve documentation
+- `--check-security` - Security review
+
+## Examples
+```bash
+# Enhance PR
+npx claude-flow github pr-enhance --pr-number 123
+
+# Add tests
+npx claude-flow github pr-enhance --pr-number 123 --add-tests
+
+# Full enhancement
+npx claude-flow github pr-enhance --pr-number 123 --add-tests --improve-docs
+```