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>

scripts/build-deb.sh

@@ -71,7 +71,7 @@ chmod +x "$DEB_DIR/usr/bin/beast-dump"
 
 # Generate changelog from git history
 echo_info "Generating changelog from git history..."
-CHANGELOG_DIR="$DEB_DIR/usr/share/doc/skyview"
+CHANGELOG_DIR="$DEB_DIR/usr/share/doc/skyview-adsb"
 mkdir -p "$CHANGELOG_DIR"
 
 # Get the current version and previous version
@@ -82,7 +82,7 @@ if [ -n "$PREV_VERSION" ]; then
     echo_info "Generating changelog from $PREV_VERSION to $CURRENT_VERSION"
     # Create changelog with proper Debian format
     {
-        echo "skyview ($CURRENT_VERSION) unstable; urgency=medium"
+        echo "skyview-adsb ($CURRENT_VERSION) unstable; urgency=medium"
         echo ""
         echo "  Changes since $PREV_VERSION:"
         git log --pretty=format:"  * %s" "$PREV_VERSION..HEAD" | head -20
@@ -94,7 +94,7 @@ else
     echo_info "No previous version found, generating initial changelog"
     # Create initial changelog
     {
-        echo "skyview ($CURRENT_VERSION) unstable; urgency=medium"
+        echo "skyview-adsb ($CURRENT_VERSION) unstable; urgency=medium"
         echo ""
         echo "  * Initial release"
         echo "  * Multi-source ADS-B aircraft tracker with Beast format support"