qgis additions

TODO.md

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+# TODO
+
+## GeoJSON Exports (RFC 7946 compliance)
+
+- Geometry in WGS84: Output `geometry.coordinates` as `[lon, lat]` (degrees). Do not include a top-level `crs` member (deprecated in RFC 7946).
+- Move custom coords to properties: Keep fantasy/cartesian meters and pixel positions under `properties` (e.g., `fantasy_coordinates: [x_m, y_m]`, `x_px`, `y_px`, `meters_per_pixel`).
+- Preserve fields: Continue exporting `id`, `type`, `name`, `icon` (where applicable), style fields (`size`, `fill`, `stroke`), and `note` (legend) if present.
+- Update exporters: Apply to all GeoJSON exporters in `modules/io/export.js`:
+  - `saveGeoJsonMarkers`
+  - `saveGeoJsonRivers`
+  - `saveGeoJsonBurgs`
+  - `saveGeoJsonRoutes`
+  - `saveGeoJsonCells`
+  - `saveGeoJsonRegiments`
+- Geometry specifics:
+  - Points (markers/burgs): `[lon, lat]` via `getLongitude(x)`, `getLatitude(y)`.
+  - Lines (rivers/routes): arrays of `[lon, lat]`; keep width/length and any fantasy metrics in `properties`.
+  - Polygons (cells): rings in `[lon, lat]`; move fantasy/cartesian vertices to `properties` if needed.
+- Metadata: Keep projection info only as a custom field (e.g., `metadata.projection: "Fantasy Map Cartesian (meters)"`). Avoid reintroducing `crs`.
+- Acceptance criteria:
+  - Files validate without CRS/projection warnings in common validators.
+  - QGIS/geojson.io load geometries correctly as WGS84.
+  - Internal consumers retain access to fantasy coords via `properties`.
+- Backward compatibility: Consider a toggle to export in either WGS84 or fantasy-cartesian for users relying on previous behavior; otherwise bump export format version in `metadata`.
+
+Note: `saveGeoJsonMarkers` now includes `name` (mirrors CSV). Ensure other exporters include analogous name fields where applicable.
+