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/core/main.c

@@ -32,6 +32,7 @@
 #include "sys/kernel_subsystem.h"
 #include "sys/module_manager.h"
 #include "sys/bootfs_state.h"
+#include "input/keymap.h"
 
 extern void sysfs_init_subsystems(void);
 
@@ -314,6 +315,7 @@ void kmain(void) {
     fat32_mkdir("/Library/images/gif");
     fat32_mkdir("/Library/Fonts");
     fat32_mkdir("/Library/DOOM");
+    fat32_mkdir("/Library/conf");
     fat32_mkdir("/Library/bsh");
     fat32_mkdir("/docs");
     fat32_mkdir("/root");
@@ -430,6 +432,9 @@ void kmain(void) {
     ps2_init();
     asm("sti");
 
+    keymap_init();
+    serial_write("[INIT] Keymap initialized");
+
     lapic_init();
 
     if (smp_request.response != NULL) {