Add licensing info and new contribution policy

src/main/resources/assets/firmament/lang/en_us.json

@@ -1,3 +1,20 @@
+/**
+ * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
+ * Copyright (C) 2023 Linnea Gräf
+ *
+ * This program 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
 {
     "firmament.repo.reload.network": "Trying to redownload the repository",
     "firmament.repo.reload.disk": "Reloading repository from disk. This may lag a bit.",

src/main/resources/hotswap-agent.properties

@@ -1,2 +1,20 @@
+#
+# Firmament is a Hypixel Skyblock mod for modern Minecraft versions
+# Copyright (C) 2023 Linnea Gräf
+#
+# This program 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 3 of the License, or
+# (at your option) any later version.
+#
+# This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+
 disabledPlugins=Log4j2,Proxy
 LOGGER=info