REUSE compliance [1/*]

Resolve license and copyright issues for all files other than the "app/" module

Signed-off-by: Aayush Gupta <aayushgupta219@gmail.com>

app/.gitignore

@@ -1 +1,6 @@
-/build
+#
+# SPDX-FileCopyrightText: 2021 Aurora OSS
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+
+/build

app/build.gradle.kts

@@ -1,22 +1,8 @@
 /*
- * Aurora Store
- *  Copyright (C) 2021, Rahul Kumar Patel <whyorean@gmail.com>
- *  Copyright (C) 2022, The Calyx Institute
- *  Copyright (C) 2023, grrfe <grrfe@420blaze.it>
- *
- *  Aurora Store is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  Aurora Store is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with Aurora Store.  If not, see <http://www.gnu.org/licenses/>.
- *
+ * SPDX-FileCopyrightText: 2021-2025 Rahul Kumar Patel <whyorean@gmail.com>
+ * SPDX-FileCopyrightText: 2022-2025 The Calyx Institute
+ * SPDX-FileCopyrightText: 2023 grrfe <grrfe@420blaze.it>
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 @file:OptIn(KspExperimental::class)

app/lint.xml

@@ -1,4 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ SPDX-FileCopyrightText: 2023-2025 The Calyx Institute
+  ~ SPDX-FileCopyrightText: 2025 Aurora OSS
+  ~ SPDX-License-Identifier: GPL-3.0-or-later
+  -->
 <lint>
     <issue id="MissingTranslation" severity="ignore" />
     <issue id="ProtectedPermissions" severity="ignore" />

app/proguard-rules.pro

@@ -1,3 +1,9 @@
+#
+# SPDX-FileCopyrightText: 2021-2025 Rahul Kumar Patel <whyorean@gmail.com>
+# SPDX-FileCopyrightText: 2023-2025 The Calyx Institute
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+
 # Add project specific ProGuard rules here.
 # You can control the set of applied configuration files using the
 # proguardFiles setting in build.gradle.kts.
@@ -129,4 +135,4 @@
 -keep class com.huawei.** { *; }
 -dontwarn com.huawei.**
 -keep class com.hihonor.** { *; }
--dontwarn com.hihonor.**
+-dontwarn com.hihonor.**