Add WIP docs for incomplete planned items

New WIP documents:
- FOSSORIAL-TUNNELS.md - Pangolin/Gerbil self-hosted tunnels (not deployed)
- VLAN-SEGMENTATION.md - Network segmentation plan (not implemented)
- REMOTE-GAMING.md - Sunshine/Moonlight streaming (in progress)

Changes:
- Renamed 05-CHANGELOG.md → 00-CHANGELOG.md
- Updated wip/README.md with all planned items

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

@@ -26,7 +26,7 @@ docs/
 ├── 02-SERVICES-CRITICAL.md  # DNS, Auth, Routing - must stay up
 ├── 03-SERVICES-OTHER.md     # All other services
 ├── 04-HARDWARE-INVENTORY.md # Physical devices, specs, serials
-├── 05-CHANGELOG.md          # Major events only
+├── 00-CHANGELOG.md          # Major events only
 ├── wip/                     # Planned changes & ideas
 │   ├── UPGRADE-2026-HARDWARE.md
 │   └── GITOPS-CONTAINERS.md
@@ -70,7 +70,7 @@ ssh -i ~/.ssh/mikrotik_key -p 2222 unraid@192.168.31.1
 
 ## Change Management
 
-- **Major changes:** Document in `05-CHANGELOG.md`
+- **Major changes:** Document in `00-CHANGELOG.md`
 - **Minor changes:** Git commit messages only
 - **Planned work:** Create doc in `wip/` folder