feat(core): Gnutella joining after Java, measured against Java

GnutellaRun lets Java's PeerToPeerAnwendung join peers on terminal-net.
The core's gnutella.ts does the same: a ping in Java's text format to
port 6346, a pong back, the ping sent on to the other peers and their
pongs back the way it came, at most the program's number of peers.

Departure from Java: a ping that comes a second time gets no pong and
its connection stays (Java's worker throws on the missing pong).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/fls/src/projectSnapshot.ts

@@ -39,6 +39,7 @@ export function projectSnapshot(project: ImportedProject): TopologySnapshot {
     emailServers.set(nodeId, { domain: configuration.domain, accounts: configuration.accounts, isActive: project.activePrograms.get(nodeId)?.has('emailServer') === true });
   }
   const emailClients = new Map([...project.emailClientConfigurations].filter(([nodeId]) => project.installedPrograms.get(nodeId)?.has('emailClient') === true));
+  const gnutella = new Map([...project.gnutellaConfigurations].filter(([nodeId]) => project.installedPrograms.get(nodeId)?.has('gnutella') === true));
   const terminals = new Set([...project.installedPrograms].filter(([, programs]) => programs.has('commandPrompt')).map(([nodeId]) => nodeId));
   const webBrowsers = new Set([...project.installedPrograms].filter(([, programs]) => programs.has('webBrowser')).map(([nodeId]) => nodeId));
   return topologySnapshot({
@@ -66,6 +67,7 @@ export function projectSnapshot(project: ImportedProject): TopologySnapshot {
     emailServersByNodeId: emailServers,
     emailClientsByNodeId: emailClients,
     terminalNodeIds: terminals,
+    gnutellaByNodeId: gnutella,
     fileSystemsByNodeId: project.virtualFileSystems,
   });
 }