Migrate to new Gitea instance (gitea.wbd-rd.nl)

- Update all submodule URLs from gitea.centraal.wbd-rd.nl to gitea.wbd-rd.nl
- Add settler as proper submodule in .gitmodules
- Add agent skills, function anchors, decisions, and improvements
- Add Docker configuration and scripts
- Add manuals and third_party docs
- Update .gitignore with secrets and build artifacts
- Remove stale .tgz build artifact

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

manuals/node-red/flowfuse-dashboard-layout-manual.md

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+# FlowFuse Dashboard Layout Notes (EVOLV Reference)
+
+Primary sources:
+- https://dashboard.flowfuse.com/
+- https://dashboard.flowfuse.com/nodes/widgets/ui-chart.html
+
+## Compact Screen Guidelines
+
+- Use a 12-column page grid and place charts in 4-column blocks for 3-up rows.
+- Disable legends for single-series charts to reduce visual noise.
+- Prefer concise text widgets under charts for state/timing/snapshot summaries.
+- Use compact theme spacing:
+  - lower page padding
+  - lower group gap
+  - lower widget gap
+
+## Time Window Guidelines
+
+- For live demos, default chart history to 10-15 minutes.
+- Keep axis labels short and unit-specific.
+- Use one chart per KPI unless comparison is intentionally needed.
+
+## Message Hygiene For Widgets
+
+- Chart widgets: send minimal `{ topic, payload, timestamp }`.
+- Text widgets: send plain string in `msg.payload`.
+- Separate chart and text outputs by Function-node output index.
+
+## Gauge Sizing in Groups
+
+- **Tank gauge**: `width: 2, height: 4` — tall vertical fill indicator.
+- **3/4 arc gauge**: `width: 2, height: 3` — fits beside tank in same group row.
+- **Status text**: `width: 4, height: 1` — full group width, below gauges.
+- In a 4-column group, two `width: 2` gauges sit side by side, text below spans full width.
+- Set `order` on widgets: tank=2, arc=3, text=1 (text first = top, gauges below; or tank=1, arc=2, text=3 for gauges on top).
+
+## Group Height Auto-sizing
+
+- Set `height: "1"` on groups to auto-grow with content.
+- A group with a `height: 4` tank + `height: 1` text will auto-expand to ~5 rows.
+
+## References
+
+- FlowFuse Dashboard docs root: https://dashboard.flowfuse.com/
+- FlowFuse `ui-chart` docs: https://dashboard.flowfuse.com/nodes/widgets/ui-chart.html
+- FlowFuse Widget catalog: [flowfuse-widgets-catalog.md](flowfuse-widgets-catalog.md)
+- FlowFuse Config nodes: [flowfuse-ui-config-manual.md](flowfuse-ui-config-manual.md)