Copy docs into Zeek repo directly

This is based on commit 2731def9159247e6da8a3191783c89683363689c from the
zeek-docs repo.

doc/scripting/js/connection-service.js

@@ -0,0 +1,9 @@
+// connection-service.js
+zeek.on('connection_state_remove', { priority: 10 }, (c) => {
+  // c.service.push('service-from-js'); only modifies JavaScript array
+  c.service = c.service.concat('service-from-js');
+});
+
+zeek.hook('Conn::log_policy', (rec, id, filter) => {
+  console.log(rec.service);
+});