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/start.sh

@@ -17,7 +17,7 @@ echo -e "${GREEN}=== Furt Lua HTTP-Server Startup ===${NC}"
 LUA_COMMAND=""
 
 # Config check first
-if [ "$(uname)" = "OpenBSD" ] || [ "$(uname)" = "FreeBSD" ]; then
+if [ "$(uname)" = "OpenBSD" ]; then
     CONFIG_FILE="/usr/local/etc/furt/furt.conf"
     PID_FILE="/var/run/furt/furt.pid"
 else