fix(NG0203): eliminate duplicate @angular/core via workspaces + tsconfig paths

Root cause: the library source (../src/) and the example app (example/src/)
each resolved @angular/core from their own separate node_modules trees.
esbuild bundled both instances, and Angular's injection-context check (which
uses a module-level singleton) failed in production because the directive
was registered against one instance while inject() ran against the other.

Fix 1 – npm workspaces ("workspaces": ["example"])
  Declares the example as a workspace so npm hoists shared packages.
  All Angular packages from example/package.json are merged into the root
  devDependencies, which were also expanded to cover the full Angular set.

Fix 2 – tsconfig paths in example/tsconfig.json
  Explicit path aliases for @angular/* and rxjs point every import
  (including those in library source files processed via the path alias
  ../src/public-api.ts) to example/node_modules, guaranteeing a single
  physical module regardless of which directory a source file lives in.

Also updates the CI workflow to a single `npm ci` at root (workspaces
installs everything in one pass) and supersedes the separate
setup-gh-pages workflow PR (#24).

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

Author: ajaysinghj8

.github/workflows/deploy-gh-pages.yml

@@ -22,14 +22,12 @@ jobs:
           node-version: '20'
           cache: 'npm'
 
-      # Library devDeps must be installed so the example build can resolve
-      # @angular/core from the root node_modules (path alias ../src/public-api.ts)
-      - name: Install library dependencies
+      # Single install thanks to npm workspaces — all packages (root + example)
+      # are hoisted into one node_modules tree, guaranteeing a single copy of
+      # @angular/core and eliminating the NG0203 duplicate-module error.
+      - name: Install dependencies
         run: npm ci
 
-      - name: Install example dependencies
-        run: npm ci
-        working-directory: example
 
       - name: Build example
         run: npx ng build --base-href /angular-draggable/ --configuration production

example/tsconfig.json

@@ -19,7 +19,22 @@
     "lib": ["ES2022", "dom"],
     "baseUrl": "",
     "paths": {
-      "angular-draggable": ["../src/public-api.ts"]
+      "angular-draggable": ["../src/public-api.ts"],
+      "@angular/animations": ["./node_modules/@angular/animations"],
+      "@angular/animations/*": ["./node_modules/@angular/animations/*"],
+      "@angular/common": ["./node_modules/@angular/common"],
+      "@angular/common/*": ["./node_modules/@angular/common/*"],
+      "@angular/compiler": ["./node_modules/@angular/compiler"],
+      "@angular/compiler/*": ["./node_modules/@angular/compiler/*"],
+      "@angular/core": ["./node_modules/@angular/core"],
+      "@angular/core/*": ["./node_modules/@angular/core/*"],
+      "@angular/platform-browser": ["./node_modules/@angular/platform-browser"],
+      "@angular/platform-browser/*": ["./node_modules/@angular/platform-browser/*"],
+      "@angular/platform-browser-dynamic": ["./node_modules/@angular/platform-browser-dynamic"],
+      "@angular/platform-browser-dynamic/*": ["./node_modules/@angular/platform-browser-dynamic/*"],
+      "rxjs": ["./node_modules/rxjs"],
+      "rxjs/*": ["./node_modules/rxjs/*"],
+      "tslib": ["./node_modules/tslib"]
     }
   },
   "angularCompilerOptions": {