feat: Vfs and Ext2 support. Code style/attribute improvements

Added VFS and Ext2 support.
Optimized attributes of methods to improve code highlighting.
Printf attribute, malloc attribute, etc.

rootfs/mount_rootfs.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+IMG_FILE=rootfs.img
+IMG_SIZE=100 # MB
+
+function log() {
+  echo "$*"
+}
+
+function yes_or_no() {
+  while true; do
+    read -p "$* [y/n]: " yn
+    case $yn in
+    [Yy]*) return 0 ;;
+    [Nn]*)
+      echo "Aborted"
+      return 1
+      ;;
+    esac
+  done
+}
+
+function setup_lb() {
+  sudo losetup -fP --show ${IMG_FILE}
+}
+
+if [ ! -f "${IMG_FILE}" ]; then
+  log "${IMG_FILE} doesn't exist"
+  exit 1
+fi
+
+LB_DEV="$(setup_lb)"
+
+if [ -z "${LB_DEV}" ]; then
+  log "Failed to setup loobback"
+  exit 1
+fi
+
+sudo mount "${LB_DEV}p1" mnt