Switch to AGPL-3.0 (#86)

LOCKED until:
- [ ] Review each individual file for third party licenses
- [ ] Implement AGPL headers into each file
- [ ] Get confirmation from all contributors/copyright owners to make
the license change
- [ ] Eventually figure out bits of code of contributors that either
dont agree to the license change or that are unresponsive

README.md

@@ -52,3 +52,22 @@ In the root directory of the project,
 Should you run out of RAM while building, you can ommit the `--parallel` intruction, it will then use less RAM due to building only on one CPU thread.
 
 You can also specify a number of threads to use, for example `--parallel 4` will use four CPU threads, but due to the small project size, you may be faster just omitting `--parallel` instead of trying to find the highest possible multithread number
+
+
+## License
+
+BeamMP Launcher, a launcher for the BeamMP mod for BeamNG.drive
+Copyright (C) 2024 BeamMP Ltd., BeamMP team and contributors.
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero 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 Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.