WebUI: Cytoscape.js, ELK und cytoscape-elk eingecheckt (#711)

Fuer die Teamuebersicht (Lagebild, #711), auf Freigabe des Nutzers. Als Dateien
im wwwroot statt ueber ein CDN, weil die Zielmaschine womoeglich kein Internet
hat (WebUI-Leitfaden).

- cytoscape 3.34.3 (MIT), elkjs 0.9.3 (EPL-2.0), cytoscape-elk 2.3.0 (MIT)
- aus der npm-Registry, Tarballs gegen dist.integrity (SHA-512) geprueft
- elkjs bewusst 0.9.3: cytoscape-elk 2.3.0 verlangt ^0.9.3
- Lizenztexte daneben, vendor/README.md mit Version, Herkunft und SHA-256

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

src/ClawdDotNet.Manager.Web/wwwroot/vendor/cytoscape-elk/LICENSE

@@ -0,0 +1,21 @@
+
+
+Copyright (c) 2016-2018, 2020, The Cytoscape Consortium.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the “Software”), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.