build(deps): upgrade Angular 17 to Angular 18 with NgModule cleanup

[trungvose]

Summary

• Upgrade Angular core packages to v18.2.14 (from v17.3.12)
• Upgrade @angular-builders/custom-webpack to 18.0.0
• Upgrade @angular-eslint/* to 18.4.3
• Upgrade @angular/cdk to 18.2.14
• Upgrade ng-zorro-antd to 18.2.1 and @ant-design/icons-angular to 18.0.0
• Upgrade ngx-quill to 26.x and Quill v1 → v2 (required for Angular 18 support)
• Remove all remaining NgModules (AppRoutingModule, ProjectModule, ProjectRoutingModule, WorkInProgressModule, WorkInProgressRoutingModule, JiraControlModule)
• Migrate to provideRouter() with standalone route configs (app.routes.ts, project.routes.ts, work-in-progress.routes.ts)
• Clean up main.ts — remove BrowserModule, ReactiveFormsModule, NzSpinModule from importProvidersFrom
• Remove deprecated extractCss build option from angular.json

Notes

• TypeScript ~5.4.5 and zone.js ~0.14.10 were already compatible — no upgrade needed
• Storybook v6→v7 migration deferred to a separate PR
• Build system migration (esbuild) deferred — staying on webpack due to @angular-builders/custom-webpack dependency
• Zoneless change detection and signal inputs are available but migration deferred
• NzIconModule.forChild(NZ_JIRA_ICONS) preserved via route-level providers

Test plan

• npm install runs without errors (no --force needed)
• ng build (prod) compiles successfully
• ng lint passes clean
• App loads and core features work in browser
• Rich text editor (Quill v2) works — create issue + edit issue description
• Drag and drop works
• Icons render correctly
• Netlify preview deployment succeeds

🤖 Generated with Claude Code