chore: add MPL license headers to all source files (#2977)

src/app/shared/dropdown/dropdown.component.html

@@ -1,3 +1,11 @@
+<!--
+  Copyright since 2025 Mifos Initiative
+
+  This Source Code Form is subject to the terms of the Mozilla Public
+  License, v. 2.0. If a copy of the MPL was not distributed with this
+  file, You can obtain one at http://mozilla.org/MPL/2.0/.
+-->
+
 <mat-form-field class="flex-28">
   <mat-label>{{ getLabelText() }}</mat-label>
   <mat-select placeholder="{{ getPlaceHolderText() }}" formControlName="controlSelect">

src/app/shared/dropdown/dropdown.component.scss

@@ -0,0 +1,7 @@
+/**
+ * Copyright since 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */

src/app/shared/dropdown/dropdown.component.ts

@@ -1,3 +1,11 @@
+/**
+ * Copyright since 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
 import { Component, Input, inject } from '@angular/core';
 import { UntypedFormControl, ReactiveFormsModule } from '@angular/forms';
 import { TranslateService } from '@ngx-translate/core';