feat: add @sda/flair-elements-ui library

Angular 19+ standalone library with 61 components, 15 directives,
and 8 services for decorative visual effects, animations, and
micro-interactions.

Components include particle systems, flow fields, aurora effects,
tilt/holographic/spotlight cards, text effects, dividers, scroll
animations, generative art, celebrations, image treatments,
morphing shapes, terminal output, and pattern textures.

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

package.json

@@ -0,0 +1,39 @@
+{
+  "name": "@sda/flair-elements-ui",
+  "version": "0.1.0",
+  "description": "Decorative and aesthetic visual effects library with animated backgrounds, text effects, generative art, celebration animations, scroll effects, and micro-interaction directives",
+  "keywords": [
+    "angular",
+    "flair",
+    "effects",
+    "particles",
+    "animations",
+    "decorative",
+    "components",
+    "ui"
+  ],
+  "license": "MIT",
+  "sideEffects": false,
+  "exports": {
+    "./src/styles": "./src/styles/_index.scss"
+  },
+  "scripts": {
+    "build": "ng-packagr -p ng-package.json",
+    "build:dev": "./build-for-dev.sh"
+  },
+  "peerDependencies": {
+    "@angular/common": "^19.1.0",
+    "@angular/core": "^19.1.0",
+    "@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": "^19.1.0",
+    "@sda/base-ui": "file:../base-ui/dist",
+    "ng-packagr": "^19.1.0",
+    "typescript": "~5.5.0"
+  }
+}