feat: Add proxy pac generator

.env.example

@@ -0,0 +1,11 @@
+# Server configuration
+WORKERS=1
+THREADS=2
+
+# Proxy PAC configuration
+# The proxy server address (hostname:port)
+PROXY_ADDRESS=127.0.0.1:8080
+
+# Additional TLDs to skip beyond the IANA list
+# The server automatically skips all TLDs from IANA plus some special ones
+ADDITIONAL_SKIP_TLDS=lan