chore: make yuzu REUSE compliant

[REUSE] is a specification that aims at making file copyright
information consistent, so that it can be both human and machine
readable. It basically requires that all files have a header containing
copyright and licensing information. When this isn't possible, like
when dealing with binary assets, generated files or embedded third-party
dependencies, it is permitted to insert copyright information in the
`.reuse/dep5` file.

Oh, and it also requires that all the licenses used in the project are
present in the `LICENSES` folder, that's why the diff is so huge.
This can be done automatically with `reuse download --all`.

The `reuse` tool also contains a handy subcommand that analyzes the
project and tells whether or not the project is (still) compliant,
`reuse lint`.

Following REUSE has a few advantages over the current approach:

- Copyright information is easy to access for users / downstream
- Files like `dist/license.md` do not need to exist anymore, as
  `.reuse/dep5` is used instead
- `reuse lint` makes it easy to ensure that copyright information of
  files like binary assets / images is always accurate and up to date

To add copyright information of files that didn't have it I looked up
who committed what and when, for each file. As yuzu contributors do not
have to sign a CLA or similar I couldn't assume that copyright ownership
was of the "yuzu Emulator Project", so I used the name and/or email of
the commit author instead.

[REUSE]: https://reuse.software

Follow-up to 01cf05bc75b1e47beb08937439f3ed9339e7b254

4 files changed, 20 insertions, 0 deletions

diff --git a/dist/qt_themes/colorful/style.qrc b/dist/qt_themes/colorful/style.qrc
index bd7898eb1..4b3f28d89 100644
--- a/dist/qt_themes/colorful/style.qrc
+++ b/dist/qt_themes/colorful/style.qrc
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: 2019 yuzu Emulator Project
+SPDX-License-Identifier: GPL-2.0-or-later
+-->
+
 <RCC>
     <qresource prefix="icons/colorful">
         <file alias="index.theme">icons/index.theme</file>
diff --git a/dist/qt_themes/colorful_dark/style.qrc b/dist/qt_themes/colorful_dark/style.qrc
index 602c71b32..50e78c37b 100644
--- a/dist/qt_themes/colorful_dark/style.qrc
+++ b/dist/qt_themes/colorful_dark/style.qrc
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: 2019 yuzu Emulator Project
+SPDX-License-Identifier: GPL-2.0-or-later
+-->
+
 <RCC>
     <qresource prefix="icons/colorful_dark">
         <file alias="16x16/connected.png">../colorful/icons/16x16/connected.png</file>
diff --git a/dist/qt_themes/colorful_midnight_blue/style.qrc b/dist/qt_themes/colorful_midnight_blue/style.qrc
index bf367099a..ac8cb0d49 100644
--- a/dist/qt_themes/colorful_midnight_blue/style.qrc
+++ b/dist/qt_themes/colorful_midnight_blue/style.qrc
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: 2020 yuzu Emulator Project
+SPDX-License-Identifier: GPL-2.0-or-later
+-->
+
 <RCC>
     <qresource prefix="icons/colorful_midnight_blue">
         <file alias="index.theme">icons/index.theme</file>
diff --git a/dist/qt_themes/default/default.qrc b/dist/qt_themes/default/default.qrc
index 41842e5d8..ef080c221 100644
--- a/dist/qt_themes/default/default.qrc
+++ b/dist/qt_themes/default/default.qrc
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: 2018 yuzu Emulator Project
+SPDX-License-Identifier: GPL-2.0-or-later
+-->
+
 <RCC>
     <qresource prefix="icons/default">
         <file alias="index.theme">icons/index.theme</file>