feat(demo): add landing page with docs (#1951)

docs/app/blocks/components/theme-block/theme-block.model.ts

@@ -0,0 +1,25 @@
+import { Injectable } from '@angular/core';
+
+@Injectable()
+export class ThemeBlockModel {
+  themeTitle: string;
+  themeName: string;
+  parentTheme: string;
+  themeProperties: any[];
+
+  setThemeTitle(value) {
+    this.themeTitle = value;
+  }
+
+  setThemeName(value) {
+    this.themeName = value;
+  }
+
+  setParentTheme(value) {
+    this.parentTheme = value;
+  }
+
+  setThemeProperties(value) {
+    this.themeProperties = value;
+  }
+}