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

src/app/shared/validators/max-number-value.validator.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 { AbstractControl, ValidatorFn } from '@angular/forms';
 
 export function maxNumberValueValidator(maxControlName: string): ValidatorFn {

src/app/shared/validators/min-number-value.validator.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 { AbstractControl, ValidatorFn } from '@angular/forms';
 
 export function minNumberValueValidator(minControlName: string): ValidatorFn {

src/app/shared/validators/percentage.validator.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 { AbstractControl, ValidatorFn } from '@angular/forms';
 
 export function rangeValidator(min: number, max: number): ValidatorFn {