feat: Initialize organization chart web part with core functionality and configuration

- Added configuration files: config.json, copy-assets.json, package-solution.json, serve.json, write-manifests.json.
- Created gulpfile.js for build process.
- Implemented core logic in OrganizationChartCore.ts for account normalization and profile handling.
- Developed data service in OrganizationChartDataService.ts to fetch organization data from SharePoint User Profile Service.
- Defined types for user profiles and organization nodes in OrganizationChartTypes.ts.
- Created web part manifest for OrganizationChartWebPart.
- Built the main web part component with rendering logic and property pane configuration in OrganizationChartWebPart.ts.
- Developed React components for displaying the organization chart.
- Implemented styling for the organization chart in OrganizationChart.module.scss.
- Added localization support with English and German strings.
- Created unit tests for core functionalities in OrganizationChartCore.test.ts.
- Set up TypeScript and TSLint configurations for the project.

src/webparts/organizationChart/loc/en-us.js

@@ -0,0 +1,26 @@
+define([], function() {
+  return {
+    PropertyPaneDescription: 'Builds the organization chart from the SharePoint User Profile Service.',
+    SourceGroupName: 'Starting point and scope',
+    DisplayGroupName: 'Display',
+    TitleFieldLabel: 'Web part title',
+    StartUserFieldLabel: 'Starting person / manager',
+    StartUserFieldDescription: 'Leave empty to start with the current user. Claims login, DOMAIN\\user or UPN are supported.',
+    StartUserPlaceholder: 'DOMAIN\\user or user@contoso.local',
+    MaxDepthFieldLabel: 'Maximum levels below',
+    MaxPeopleFieldLabel: 'Maximum number of people',
+    CacheMinutesFieldLabel: 'Profile cache (minutes, 0 = off)',
+    ShowPicturesFieldLabel: 'Show profile pictures',
+    ShowContactDetailsFieldLabel: 'Show contact information',
+    ConfigureMessage: 'A starting person could not be determined.',
+    LoadingMessage: 'Loading organization chart…',
+    EmptyMessage: 'No profile data was found for the starting person.',
+    LoadErrorMessage: 'The organization chart could not be loaded from the User Profile Service.',
+    DefaultTitle: 'Organization Chart',
+    ReportsLabel: 'reports',
+    CollapseLabel: 'Collapse reports',
+    ExpandLabel: 'Expand reports',
+    TruncatedLabel: 'The organization chart was limited by the configured depth or person count.',
+    PeopleCountLabel: '{0} people'
+  };
+});