Implement story 1.1: project scaffold and verified entry points

Creates the complete src/planemapper/ layout with all module stubs,
provisioning and renderer subpackages, airports.csv data bundle,
systemd unit files, and full test scaffold. All three quality gates
pass: pytest 12/12, ruff check zero violations, ruff format clean.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

systemd/planemapper-provision.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=planeMapper Provisioning
+After=network.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/local/bin/planemapper-provision
+StandardOutput=journal
+StandardError=journal
+RemainAfterExit=yes
+
+[Install]
+WantedBy=multi-user.target

systemd/planemapper-radar.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=planeMapper Radar Display
+After=planemapper-provision.service
+Requires=planemapper-provision.service
+
+[Service]
+Type=simple
+ExecStart=/usr/local/bin/planemapper-radar
+Restart=always
+RestartSec=5
+StandardOutput=journal
+StandardError=journal
+
+[Install]
+WantedBy=multi-user.target