Update mkinitcpio.conf

Created by: nl6720

• Use more commonly known modules for the MODULES array example.
• Add the modconf hook to all example lines.
• Add keyboard, keymap and consolefont hooks to the examples using encryption. Mostly based on https://wiki.archlinux.org/title/dm-crypt/System_configuration
• Replace mdadm hook with mdadm_udev. There were merged into one. Fixes https://bugs.archlinux.org/task/68495
• Do not mention the obsolete shutdown hook.
• Add kms to the default HOOKS array.