Rename Debian package from skyview to skyview-adsb

The official Debian repositories already contain a package named
"skyview" which is associated with NASA's SkyView Virtual Observatory
(https://skyview.gsfc.nasa.gov/), a tool for astronomical data
visualization.

To avoid package naming conflicts and potential confusion for users,
this commit renames our ADS-B aircraft tracking application package
to "skyview-adsb". This clearly indicates the package's purpose
(ADS-B tracking) while maintaining the SkyView brand identity.

Changes:
- Package name: skyview → skyview-adsb
- System user/group: skyview → skyview-adsb
- Config directory: /etc/skyview → /etc/skyview-adsb
- Data directory: /var/lib/skyview → /var/lib/skyview-adsb
- Log directory: /var/log/skyview → /var/log/skyview-adsb
- Systemd service: skyview.service → skyview-adsb.service
- Documentation path: /usr/share/doc/skyview → /usr/share/doc/skyview-adsb

The binaries (/usr/bin/skyview and /usr/bin/beast-dump) remain
unchanged as they don't conflict at the filesystem level.

This ensures clean installation alongside any existing skyview
packages and prevents apt/dpkg conflicts during installation.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

debian/DEBIAN/postinst

@@ -3,25 +3,25 @@ set -e
 
 case "$1" in
     configure)
-        # Create skyview user and group if they don't exist
-        if ! getent group skyview >/dev/null 2>&1; then
-            addgroup --system --quiet skyview
+        # Create skyview-adsb user and group if they don't exist
+        if ! getent group skyview-adsb >/dev/null 2>&1; then
+            addgroup --system --quiet skyview-adsb
         fi
         
-        if ! getent passwd skyview >/dev/null 2>&1; then
-            adduser --system --ingroup skyview --home /var/lib/skyview \
-                    --no-create-home --disabled-password --quiet skyview
+        if ! getent passwd skyview-adsb >/dev/null 2>&1; then
+            adduser --system --ingroup skyview-adsb --home /var/lib/skyview-adsb \
+                    --no-create-home --disabled-password --quiet skyview-adsb
         fi
         
         # Create directories with proper permissions
-        mkdir -p /var/lib/skyview /var/log/skyview >/dev/null 2>&1 || true
-        chown skyview:skyview /var/lib/skyview /var/log/skyview >/dev/null 2>&1 || true
-        chmod 755 /var/lib/skyview /var/log/skyview >/dev/null 2>&1 || true
+        mkdir -p /var/lib/skyview-adsb /var/log/skyview-adsb >/dev/null 2>&1 || true
+        chown skyview-adsb:skyview-adsb /var/lib/skyview-adsb /var/log/skyview-adsb >/dev/null 2>&1 || true
+        chmod 755 /var/lib/skyview-adsb /var/log/skyview-adsb >/dev/null 2>&1 || true
         
         # Set permissions on config files
-        if [ -f /etc/skyview/config.json ]; then
-            chown root:skyview /etc/skyview/config.json >/dev/null 2>&1 || true
-            chmod 640 /etc/skyview/config.json >/dev/null 2>&1 || true
+        if [ -f /etc/skyview-adsb/config.json ]; then
+            chown root:skyview-adsb /etc/skyview-adsb/config.json >/dev/null 2>&1 || true
+            chmod 640 /etc/skyview-adsb/config.json >/dev/null 2>&1 || true
         fi
         
         
@@ -29,9 +29,9 @@ case "$1" in
         systemctl daemon-reload >/dev/null 2>&1 || true
         
         # Check if service was previously enabled
-        if systemctl is-enabled skyview >/dev/null 2>&1; then
+        if systemctl is-enabled skyview-adsb >/dev/null 2>&1; then
             # Service was enabled, restart it
-            systemctl restart skyview >/dev/null 2>&1 || true
+            systemctl restart skyview-adsb >/dev/null 2>&1 || true
         fi
         ;;
 esac