refactor(docs): migrate existing content to v1 legacy structure

- Move all existing docs content (concepts, project, solution) to /docs/v1/
- Add legacy banner component to warn users about archived documentation
- Create v1 index page with legacy notice and redirect guidance
- Implement automatic banner display for all v1 paths
- Preserve all original content for reference during migration

This enables incremental content migration while maintaining access to
original documentation.

content/en/docs/v1/project/plan-in-2024/_index.md

@@ -0,0 +1,46 @@
+---
+title: Plan in 2024
+weight: 30
+description: The planned project workload in 2024
+---
+
+
+## First Blue Print in 2024
+
+Our first architectural blue print for the IPCEI-CIS Developer Framework derives from Humanitecs Reference Architecture, see links in [Blog](../../blog/240823-archsession.md)
+
+![alt text](image-2024-8-14_10-50-27.png)
+
+## C4 Model
+
+> (sources see in ./ressources/architecture-c4)
+
+> How to use: install C4lite VSC exension and/or C4lite cli - then open *.c4 files in ./ressources/architecture-c4
+
+First system landscape C4 model:
+
+![c4-model](./planes.png)
+
+## In Confluence
+
+https://confluence.telekom-mms.com/display/IPCEICIS/Architecture
+
+
+## Dimensionierung Cloud für initiales DevFramework
+
+### 28.08.24, Stefan Bethke, Florian Fürstenberg, Stephan Lo
+
+1) zuerst viele DevFrameworkPlatformEngineers arbeiten lokal, mit zentralem Deployment nach OTC in **einen/max zwei** Control-Cluster
+2) wir gehen anfangs von ca. 5 clustern aus
+3) jeder cluster mit 3 Knoten/VM (in drei AvailabilityZones)
+4) pro VM 4 CPU, 16 GB Ram, 50 GB Storage read/write once, PVCs 'ohne limit'
+5) public IPs, plus Loadbalancer
+6) Keycloak vorhanden
+7) Wildcard Domain ?? --> Eher ja
+
+Next Steps: (Vorschlag: in den nächsten 2 Wochen)
+
+1. Florian spezifiziert an Tobias
+2. Tobias stellt bereit, kubeconfig kommt an uns
+3. wir deployen
+