Initial commit: kanban-elements-ui library

Angular 19 component library for kanban boards:
- kb-board: main board with toolbar, swimlanes, and pipeline view
- kb-column: columns with WIP limits, collapse, and drag reorder
- kb-card: draggable cards with labels, assignees, and priorities
- kb-swimlane: horizontal grouping with collapsible rows
- kb-toolbar: search, sort, filter, and view toggle
- kb-quick-add: inline card creation
- kb-wip-indicator: WIP limit status display
- kb-card-def / kb-column-header-def: custom template directives

Includes signal-based services (board, drag, filter), SCSS design
tokens with dark mode, and full TypeScript type definitions.

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

package.json

@@ -0,0 +1,39 @@
+{
+  "name": "@sda/kanban-elements-ui",
+  "version": "0.1.0",
+  "description": "Angular components for kanban boards with drag-and-drop, swimlanes, WIP limits, and pipeline views powered by @sda/base-ui",
+  "keywords": [
+    "angular",
+    "kanban",
+    "board",
+    "drag-and-drop",
+    "swimlanes",
+    "pipeline",
+    "components",
+    "ui"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "https://git.sky-ai.com/ui-core-design/kanban-elements-ui.git"
+  },
+  "license": "MIT",
+  "sideEffects": false,
+  "scripts": {
+    "build": "ng-packagr -p ng-package.json",
+    "build:dev": "./build-for-dev.sh"
+  },
+  "peerDependencies": {
+    "@angular/common": "^19.0.0",
+    "@angular/core": "^19.0.0",
+    "@sda/base-ui": "*"
+  },
+  "devDependencies": {
+    "@angular/common": "^19.1.0",
+    "@angular/compiler": "^19.1.0",
+    "@angular/compiler-cli": "^19.1.0",
+    "@angular/core": "^19.1.0",
+    "@angular/forms": "^19.2.18",
+    "ng-packagr": "^19.1.0",
+    "typescript": "~5.7.2"
+  }
+}