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/components/OrganizationChart.module.scss

@@ -0,0 +1,62 @@
+@import '~@microsoft/sp-office-ui-fabric-core/dist/sass/SPFabricCore.scss';
+
+.organizationChart {
+  color: "[theme:bodyText, default:#323130]";
+  font-family: "Segoe UI", "Segoe UI Web (West European)", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif;
+}
+.header { align-items: baseline; display: flex; justify-content: space-between; margin-bottom: 12px; }
+.heading { font-size: 24px; font-weight: 300; line-height: 32px; margin: 0; }
+.count { color: "[theme:neutralSecondary, default:#605e5c]"; font-size: 12px; }
+.notice { background: "[theme:neutralLighter, default:#f3f2f1]"; border-left: 3px solid "[theme:themePrimary, default:#0078d4]"; margin-bottom: 12px; padding: 8px 12px; }
+.viewport { overflow: auto; padding: 4px 4px 24px; }
+.tree { display: table; margin: 0 auto; min-width: max-content; }
+.tree ul { display: flex; justify-content: center; list-style: none; margin: 0; padding: 22px 0 0; position: relative; }
+.tree li { list-style: none; padding: 22px 8px 0; position: relative; text-align: center; }
+.tree > ul { padding-top: 0; }
+.tree > ul > li { padding-top: 0; }
+.tree li::before, .tree li::after { border-top: 1px solid "[theme:neutralTertiary, default:#a19f9d]"; content: ''; height: 22px; position: absolute; right: 50%; top: 0; width: 50%; }
+.tree li::after { border-left: 1px solid "[theme:neutralTertiary, default:#a19f9d]"; left: 50%; right: auto; }
+.tree li:only-child::before, .tree li:only-child::after { display: none; }
+.tree li:only-child { padding-top: 22px; }
+.tree > ul > li:only-child { padding-top: 0; }
+.tree li:first-child::before, .tree li:last-child::after { border: 0; }
+.tree li:last-child::before { border-right: 1px solid "[theme:neutralTertiary, default:#a19f9d]"; border-radius: 0 4px 0 0; }
+.tree li:first-child::after { border-radius: 4px 0 0 0; }
+.tree ul ul::before { border-left: 1px solid "[theme:neutralTertiary, default:#a19f9d]"; content: ''; height: 22px; left: 50%; position: absolute; top: 0; }
+.nodeWrap { display: inline-block; position: relative; }
+.personCard {
+  background: "[theme:white, default:#ffffff]";
+  border: 1px solid "[theme:neutralLight, default:#edebe9]";
+  box-shadow: 0 1px 3px rgba(0, 0, 0, .12);
+  color: "[theme:bodyText, default:#323130]";
+  display: block;
+  min-height: 92px;
+  text-align: left;
+  text-decoration: none;
+  width: 230px;
+}
+.personCard:hover { border-color: "[theme:themePrimary, default:#0078d4]"; color: "[theme:bodyText, default:#323130]"; }
+.personCard:focus { outline: 2px solid "[theme:focusBorder, default:#605e5c]"; outline-offset: 1px; }
+.cardContent { align-items: center; display: flex; min-height: 92px; padding: 12px; position: relative; }
+.photoWrap { background: "[theme:themePrimary, default:#0078d4]"; border-radius: 50%; flex: 0 0 56px; height: 56px; margin-right: 12px; overflow: hidden; position: relative; }
+.initials { color: #fff; font-size: 18px; left: 0; line-height: 56px; position: absolute; right: 0; text-align: center; }
+.photo { height: 56px; object-fit: cover; position: relative; width: 56px; z-index: 1; }
+.personText { display: block; min-width: 0; padding-bottom: 16px; }
+.name { display: block; font-size: 15px; font-weight: 600; line-height: 20px; }
+.jobTitle, .department, .email, .location { color: "[theme:neutralSecondary, default:#605e5c]"; display: block; font-size: 12px; line-height: 17px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+.email { color: "[theme:themePrimary, default:#0078d4]"; }
+.reportCount { bottom: 8px; color: "[theme:neutralSecondary, default:#605e5c]"; font-size: 11px; position: absolute; right: 10px; }
+.toggle { background: "[theme:white, default:#ffffff]"; border: 1px solid "[theme:neutralTertiary, default:#a19f9d]"; border-radius: 50%; bottom: -11px; color: "[theme:themePrimary, default:#0078d4]"; cursor: pointer; font-size: 16px; height: 23px; left: calc(50% - 11px); line-height: 18px; padding: 0; position: absolute; width: 23px; z-index: 2; }
+.toggle:hover, .toggle:focus { background: "[theme:neutralLighter, default:#f3f2f1]"; outline: none; }
+.status { color: "[theme:bodyText, default:#323130]"; padding: 16px; }
+.error { color: "[theme:errorText, default:#a80000]"; padding: 16px; }
+
+@media (max-width: 600px) {
+  .tree { display: block; min-width: 0; width: 100%; }
+  .tree ul { display: block; padding: 12px 0 0 18px; }
+  .tree li { padding: 12px 0 0 12px; text-align: left; }
+  .tree li::before, .tree li::after, .tree ul ul::before { display: none; }
+  .tree > ul > li, .tree li:only-child { padding-top: 0; }
+  .personCard { max-width: 100%; width: 260px; }
+  .toggle { bottom: auto; left: -11px; top: 36px; }
+}