Kernel: Move TTY-related code to a new subdirectory under Devices

The TTY subsystem is represented with unix devices, so it should be
under the Devices directory like the Audio, Storage, GPU and HID
subsystems.

Kernel/Devices/TTY/ConsoleManagement.h

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Types.h>
+#include <Kernel/Devices/TTY/VirtualConsole.h>
+#include <Kernel/Library/NonnullLockRefPtr.h>
+
+namespace Kernel {
+
+class ConsoleManagement {
+    friend class VirtualConsole;
+
+public:
+    ConsoleManagement();
+
+    static constexpr size_t s_max_virtual_consoles = 6;
+
+    static bool is_initialized();
+    static ConsoleManagement& the();
+
+    void switch_to(unsigned);
+    void initialize();
+
+    void resolution_was_changed();
+
+    void switch_to_debug() { switch_to(1); }
+
+    NonnullLockRefPtr<VirtualConsole> first_tty() const { return m_consoles[0]; }
+    NonnullLockRefPtr<VirtualConsole> debug_tty() const { return m_consoles[1]; }
+
+    RecursiveSpinlock<LockRank::None>& tty_write_lock() { return m_tty_write_lock; }
+
+private:
+    Vector<NonnullLockRefPtr<VirtualConsole>, s_max_virtual_consoles> m_consoles;
+    VirtualConsole* m_active_console { nullptr };
+    Spinlock<LockRank::None> m_lock {};
+    RecursiveSpinlock<LockRank::None> m_tty_write_lock {};
+};
+
+};