chore: update project references and add Citron copyright

- Replaced all references to the old project name with Citron.
- Added Citron copyright information alongside existing notices in all files.

src/common/uuid.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project & 2025 citron Homebrew Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
@@ -76,9 +76,9 @@ struct UUID {
     u128 AsU128() const;
 
     /**
-     * Creates a default UUID "yuzu Default UID".
+     * Creates a default UUID "citron Default UID".
      *
-     * @returns A UUID with its bytes set to the ASCII values of "yuzu Default UID".
+     * @returns A UUID with its bytes set to the ASCII values of "citron Default UID".
      */
     static constexpr UUID MakeDefault() {
         return UUID{