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

src/app/clients/edit-client/edit-client.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/.
+-->
+
 <div class="container">
   <mat-card>
     <form [formGroup]="editClientForm">

src/app/clients/edit-client/edit-client.component.scss

@@ -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/.
+ */
+
 .margin-v {
   margin: 2em 0 0;
 }

src/app/clients/edit-client/edit-client.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/.
+ */
+
 /** Angular Imports */
 import { Component, OnInit, inject } from '@angular/core';
 import { ActivatedRoute, Router, RouterLink } from '@angular/router';