Organize docs directory: move 25 files to appropriate locations

- Created docs/00-meta/ for documentation meta files (11 files)
- Created docs/archive/reports/ for reports (5 files)
- Created docs/archive/issues/ for issue tracking (2 files)
- Created docs/bridge/contracts/ for Solidity contracts (3 files)
- Created docs/04-configuration/metamask/ for Metamask configs (3 files)
- Created docs/scripts/ for documentation scripts (2 files)
- Root directory now contains only 3 essential files (89.3% reduction)

All recommended actions from docs directory review complete.

scripts/stop_ssh_tunnel.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+# Stop SSH tunnel for Proxmox API access
+
+PROXMOX_HOST="${PROXMOX_HOST:-192.168.11.10}"
+PROXMOX_PORT="${PROXMOX_PORT:-8006}"
+TUNNEL_PID_FILE="/tmp/proxmox-tunnel-${PROXMOX_HOST}-${PROXMOX_PORT}.pid"
+
+# Load from .env if available
+if [ -f ~/.env ]; then
+    export $(grep -E "^PROXMOX_" ~/.env | grep -v "^#" | xargs)
+    PROXMOX_HOST="${PROXMOX_HOST:-192.168.11.10}"
+    PROXMOX_PORT="${PROXMOX_PORT:-8006}"
+fi
+
+if [ -f "$TUNNEL_PID_FILE" ]; then
+    TUNNEL_PID=$(cat "$TUNNEL_PID_FILE")
+    if ps -p "$TUNNEL_PID" > /dev/null 2>&1; then
+        echo "Stopping tunnel (PID: $TUNNEL_PID)..."
+        kill "$TUNNEL_PID" 2>/dev/null
+        sleep 1
+        if ps -p "$TUNNEL_PID" > /dev/null 2>&1; then
+            echo "Force killing..."
+            kill -9 "$TUNNEL_PID" 2>/dev/null
+        fi
+        rm -f "$TUNNEL_PID_FILE"
+        echo "✅ Tunnel stopped"
+    else
+        echo "Tunnel not running (stale PID file)"
+        rm -f "$TUNNEL_PID_FILE"
+    fi
+else
+    echo "No tunnel PID file found"
+    echo "Checking for running tunnels..."
+    
+    # Try to find tunnel by port
+    LOCAL_PORT="${PROXMOX_PORT:-8006}"
+    PIDS=$(lsof -ti:${LOCAL_PORT} 2>/dev/null)
+    if [ -n "$PIDS" ]; then
+        echo "Found processes on port $LOCAL_PORT: $PIDS"
+        read -p "Kill these processes? (y/N) " -n 1 -r
+        echo
+        if [[ $REPLY =~ ^[Yy]$ ]]; then
+            echo "$PIDS" | xargs kill 2>/dev/null
+            echo "✅ Processes killed"
+        fi
+    else
+        echo "No tunnel processes found"
+    fi
+fi