Simplify copyright file, fill in required fields

debian/copyright

@@ -1,49 +1,13 @@
 Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 Upstream-Name: hyprcursor
-Upstream-Contact: <preferred name and address to reach the upstream project>
-Source: <url://example.com>
-#
-# Please double check copyright with the licensecheck(1) command.
+Upstream-Contact: https://github.com/hyprwm/hyprcursor/issues
+Source: https://github.com/hyprwm/hyprcursor
 
-Files:     .clang-format
-           .github/workflows/ci.yaml
-           .gitignore
-           CMakeLists.txt
-           README.md
-           docs/DEVELOPERS.md
-           docs/END_USERS.md
-           docs/MAKING_THEMES.md
-           flake.lock
-           flake.nix
-           hyprcursor-util/CMakeLists.txt
-           hyprcursor-util/README.md
-           hyprcursor-util/src/main.cpp
-           hyprcursor.pc.in
-           include/hyprcursor/hyprcursor.h
-           include/hyprcursor/hyprcursor.hpp
-           include/hyprcursor/shared.h
-           libhyprcursor/Log.hpp
-           libhyprcursor/hyprcursor.cpp
-           libhyprcursor/hyprcursor_c.cpp
-           libhyprcursor/internalDefines.hpp
-           libhyprcursor/internalSharedTypes.hpp
-           nix/default.nix
-           nix/overlays.nix
-           tests/test.c
-           tests/test.cpp
-Copyright: __NO_COPYRIGHT_NOR_LICENSE__
-License:   __NO_COPYRIGHT_NOR_LICENSE__
+Files:     *
+Copyright: 2024, Hypr Development
+License:   BSD-3-Clause
 
-#----------------------------------------------------------------------------
-# Files marked as NO_LICENSE_TEXT_FOUND may be covered by the following
-# license/copyright files.
-
-#----------------------------------------------------------------------------
-# License file: LICENSE
- BSD 3-Clause License
- .
- Copyright (c) 2024, Hypr Development
- .
+License:   BSD-3-Clause
  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are met:
  .