Initial commit: kanban-elements-demo app

Interactive Angular 19 demo for @sda/kanban-elements-ui with board
view, pipeline view, swimlanes, drag-and-drop, WIP limits, custom
card templates, and dark mode toggle.

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

package.json

@@ -0,0 +1,34 @@
+{
+  "name": "kanban-elements-demo",
+  "version": "0.0.1",
+  "description": "Demo application for @sda/kanban-elements-ui library",
+  "scripts": {
+    "ng": "ng",
+    "start": "ng serve",
+    "build": "ng build",
+    "watch": "ng build --watch --configuration development",
+    "serve": "ng serve --open"
+  },
+  "private": true,
+  "dependencies": {
+    "@angular/animations": "^19.2.0",
+    "@angular/common": "^19.2.0",
+    "@angular/compiler": "^19.2.0",
+    "@angular/core": "^19.2.0",
+    "@angular/forms": "^19.2.0",
+    "@angular/platform-browser": "^19.2.0",
+    "@angular/platform-browser-dynamic": "^19.2.0",
+    "@angular/router": "^19.2.0",
+    "@sda/kanban-elements-ui": "file:../kanban-elements-ui/dist",
+    "@sda/base-ui": "file:../../sda-frontend/libs/base-ui/dist",
+    "rxjs": "~7.8.0",
+    "tslib": "^2.3.0",
+    "zone.js": "~0.15.0"
+  },
+  "devDependencies": {
+    "@angular-devkit/build-angular": "^19.2.0",
+    "@angular/cli": "^19.2.0",
+    "@angular/compiler-cli": "^19.2.0",
+    "typescript": "~5.7.2"
+  }
+}