feat(fls): write the topology of a .fls, loaded by Java as the original

topologyWriter.ts writes konfiguration.xml from Java's view of a project:
the version line, the node items (label position, device with name,
host label flags, interfaces or ports), the cable items and the
documentation items. What a device's constructor makes is changed through
getters, as XMLEncoder does, and more is added; fewer than it makes set the
list anew. Cable ends name the port objects the getters return (the writer
now names a getter's result, <void id="Port0" property="port"/>), and each
cable carries the nodes the editor draws it between.

Checked by Java against Java: every corpus file, read and written again,
loads in Java FILIUS (the oracle's loading method, --sha256 ties its result
to the written bytes) to the same devices, names, positions, interfaces,
cables and documentation as the original; so does a synthetic topology with
what the corpus never sets. The oracle and the reader now also report a
cable's drawing ends (JCablePanel ziel1/ziel2): in the corpus the nodes it
joins, for all 183 cables. Mutation probes rewrite the files and let Java
load each mutant.

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

packages/fls/test/importProject.test.ts

@@ -1044,9 +1044,9 @@ describe('importProject rules', () => {
       topology({
         nodes: [flsNode('Switch', { portCount: 24 }), flsNode('Rechner', { interfaces: [nic('10.0.0.1')] })],
         links: [
-          { ends: [{ node: 0, port: 0 }, { node: 0, port: 1 }], wireless: false },
-          { ends: [{ node: 1, port: 0 }, { node: 0, port: 2 }], wireless: false },
-          { ends: [{ node: 0, port: 3 }, { node: 1, port: 0 }], wireless: false },
+          { ends: [{ node: 0, port: 0 }, { node: 0, port: 1 }], wireless: false, panel: [null, null] },
+          { ends: [{ node: 1, port: 0 }, { node: 0, port: 2 }], wireless: false, panel: [null, null] },
+          { ends: [{ node: 0, port: 3 }, { node: 1, port: 0 }], wireless: false, panel: [null, null] },
         ],
       }),
       counter(),