feature(input): implement keyboard layouts and utf-8 input subsystem

* Adding keyboard layout (backend)

* Update settings.c with new keyboard tab

* Fixing keyboard icon && Fixing long loading time in settings.c

* Refactor of key handling for a larger compatibility with the keyboard layout

* Adding keyboard handler

* Udating ps2.c with the new logic

* Updating WM/kernel/userland with the new input system

* Fixing keycode range && Updating dead keys handling

* Add comments for explanation

* Update notepad & vm.c to parse utf-8

* Adding utf-8 parsing utils in libc && Update notepad.c

* Adding icon for icon settings

* Fixing a warning with double definition

* Adding new kb kayout: QWERTZ and DVORAK && Update new layout instrauction

* Add documentation for keyboard input subsystem

This document outlines the architecture and design of the input subsystem, focusing on keyboard input processing, driver responsibilities, keycode representation, and keymap functionality.

---------

Co-authored-by: boreddevnl <chris@boreddev.nl>

src/input/keycodes.h

@@ -0,0 +1,84 @@
+#ifndef KEYCODES_H
+#define KEYCODES_H
+
+#include <stdint.h>
+
+typedef enum {
+    KEY_NONE = 0,
+
+    KEY_ESC,
+
+    KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, KEY_7, KEY_8, KEY_9, KEY_0,
+    KEY_MINUS,
+    KEY_EQUAL,
+    KEY_BACKSPACE,
+    KEY_TAB,
+
+    KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_U, KEY_I, KEY_O, KEY_P,
+    KEY_LBRACKET,
+    KEY_RBRACKET,
+    KEY_ENTER,
+
+    KEY_LEFT_CTRL,
+    KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_J, KEY_K, KEY_L,
+    KEY_SEMICOLON,
+    KEY_APOSTROPHE,
+    KEY_GRAVE,
+
+    KEY_LEFT_SHIFT,
+    KEY_BACKSLASH,
+    KEY_Z, KEY_X, KEY_C, KEY_V, KEY_B, KEY_N, KEY_M,
+    KEY_COMMA,
+    KEY_DOT,
+    KEY_SLASH,
+    KEY_RIGHT_SHIFT,
+
+    KEY_KP_STAR,
+    KEY_LEFT_ALT,
+    KEY_SPACE,
+    KEY_CAPS_LOCK,
+
+    KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6,
+    KEY_F7, KEY_F8, KEY_F9, KEY_F10,
+    KEY_NUM_LOCK,
+    KEY_SCROLL_LOCK,
+
+    KEY_KP_7, KEY_KP_8, KEY_KP_9,
+    KEY_KP_MINUS,
+    KEY_KP_4, KEY_KP_5, KEY_KP_6,
+    KEY_KP_PLUS,
+    KEY_KP_1, KEY_KP_2, KEY_KP_3,
+    KEY_KP_0,
+    KEY_KP_DOT,
+
+    KEY_F11,
+    KEY_F12,
+
+    KEY_KP_ENTER,
+    KEY_RIGHT_CTRL,
+    KEY_KP_SLASH,
+    KEY_RIGHT_ALT,
+
+    KEY_HOME,
+    KEY_ARROW_UP,
+    KEY_PAGE_UP,
+    KEY_ARROW_LEFT,
+    KEY_ARROW_RIGHT,
+    KEY_END,
+    KEY_ARROW_DOWN,
+    KEY_PAGE_DOWN,
+    KEY_INSERT,
+    KEY_DELETE,
+
+    KEY_MAX
+} keycode_t;
+
+#define KB_MOD_SHIFT   0x0001u
+#define KB_MOD_CTRL    0x0002u
+#define KB_MOD_ALT     0x0004u
+#define KB_MOD_ALTGR   0x0008u
+#define KB_MOD_CAPS    0x0010u
+#define KB_MOD_NUM     0x0020u
+#define KB_MOD_SCROLL  0x0040u
+
+#endif