chore(repo): rename rust-port/wifi-densepose-rs → v2/ (flatten to one level) (#427)

The Rust port lived two directories deep (rust-port/wifi-densepose-rs/)
without any sibling under rust-port/ that warranted the extra level.
Move the whole workspace up to v2/ to match v1/ (Python) at the same
depth and shorten every cd / build command across the repo.

git mv preserves history for all tracked files. 60 files updated for
path references (CI workflows, ADRs, docs, scripts, READMEs, internal
.claude-flow state). Two manual fixes for relative-cd paths in
CLAUDE.md and ADR-043 that became wrong after the depth change
(cd ../.. → cd ..).

Validated:
- cargo check --workspace --no-default-features → clean (after target/
  nuke; the gitignored target/ was carried by the OS rename and had
  hard-coded old paths in build scripts)
- cargo test --workspace --no-default-features → 1,539 passed, 0 failed,
  8 ignored (same totals as pre-rename)
- ESP32-S3 on COM7 → still streaming live CSI (cb #40300, RSSI -64 dBm)

After-merge follow-up: contributors should `rm -rf v2/target` once and
let cargo regenerate from the new path.

v2/crates/wifi-densepose-cli/src/lib.rs

@@ -0,0 +1,51 @@
+//! WiFi-DensePose CLI
+//!
+//! Command-line interface for WiFi-DensePose system, including the
+//! Mass Casualty Assessment Tool (MAT) for disaster response.
+//!
+//! # Features
+//!
+//! - **mat**: Disaster survivor detection and triage management
+//! - **version**: Display version information
+//!
+//! # Usage
+//!
+//! ```bash
+//! # Start scanning for survivors
+//! wifi-densepose mat scan --zone "Building A"
+//!
+//! # View current scan status
+//! wifi-densepose mat status
+//!
+//! # List detected survivors
+//! wifi-densepose mat survivors --sort-by triage
+//!
+//! # View and manage alerts
+//! wifi-densepose mat alerts
+//! ```
+
+use clap::{Parser, Subcommand};
+
+pub mod mat;
+
+/// WiFi-DensePose Command Line Interface
+#[derive(Parser, Debug)]
+#[command(name = "wifi-densepose")]
+#[command(author, version, about = "WiFi-based pose estimation and disaster response")]
+#[command(propagate_version = true)]
+pub struct Cli {
+    /// Command to execute
+    #[command(subcommand)]
+    pub command: Commands,
+}
+
+/// Top-level commands
+#[derive(Subcommand, Debug)]
+pub enum Commands {
+    /// Mass Casualty Assessment Tool commands
+    #[command(subcommand)]
+    Mat(mat::MatCommand),
+
+    /// Display version information
+    Version,
+}

v2/crates/wifi-densepose-cli/src/main.rs

@@ -0,0 +1,31 @@
+//! WiFi-DensePose CLI Entry Point
+//!
+//! This is the main entry point for the wifi-densepose command-line tool.
+
+use clap::Parser;
+use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt, EnvFilter};
+
+use wifi_densepose_cli::{Cli, Commands};
+
+#[tokio::main]
+async fn main() -> anyhow::Result<()> {
+    // Initialize logging
+    tracing_subscriber::registry()
+        .with(EnvFilter::try_from_default_env().unwrap_or_else(|_| EnvFilter::new("info")))
+        .with(tracing_subscriber::fmt::layer().with_target(false))
+        .init();
+
+    let cli = Cli::parse();
+
+    match cli.command {
+        Commands::Mat(mat_cmd) => {
+            wifi_densepose_cli::mat::execute(mat_cmd).await?;
+        }
+        Commands::Version => {
+            println!("wifi-densepose {}", env!("CARGO_PKG_VERSION"));
+            println!("MAT module version: {}", wifi_densepose_mat::VERSION);
+        }
+    }
+
+    Ok(())
+}