docs: simplify README and remove FreeBSD support

- Strip README to essentials with wiki references only
- Remove non-existent API docs and troubleshooting links
- Focus on quick start and actual integrations (merkwerk)
- Remove FreeBSD support from all installation scripts
- Clean up platform detection logic in scripts
- Maintain OpenBSD and Linux support only

Reduces maintenance burden and aligns with actual project scope.

scripts/sync-files.sh

@@ -24,8 +24,13 @@ cp -r integrations/ "$TARGET/"
 [ -f "VERSION" ] && cp VERSION "$TARGET/"
 [ -f ".version_history" ] && cp .version_history "$TARGET/"
 
-# Set proper permissions
-chown -R root:wheel "$TARGET" 2>/dev/null || chown -R root:root "$TARGET"
+# Set proper permissions based on operating system
+if [ "$(uname)" = "OpenBSD" ]; then
+    chown -R root:wheel "$TARGET"
+else
+    chown -R root:root "$TARGET"
+fi
+
 chmod -R 644 "$TARGET"
 find "$TARGET" -type d -exec chmod 755 {} \;
 chmod +x "$TARGET/scripts/start.sh"