Add completion for 'mount', 'sv', 'aria2c', 'mkinitcpio', '7z', 'hdparm'

[runitclean]

Hello, this PR adds completion for several commands

• mount: is well known and used for fs mounting in various *nix environments, currently, I only flags used by ubase variant.
• sv: is a small utility to manage service in the runit init system (used primarily by Void/Artix Linux).
• aria2c: is a versatile download utility, handles MANY sources and used under the hood by many other utilities such as yt-dlp.
• mkinitcpio: a utility that generates initramfs images, it packages/loads the kernel modules and tools (LUKS, LVM..) needed to mount the root filesystem and hand control to the system's init process.
• 7z: the well known file archiver
• hdparm: a utility for viewing nd adjusting SATA/IDE hard drive hardware params, this includes: test read performance, set power management profiles (APM), and perform low-level tasks like Secure Erase (I only picked few flags that are used a lot).

[magicant]

I didn't understand the command-line syntax for any of these tools, so I had an AI review them instead.

[runitclean]

I've applied the changes and also squashed the commits to clean the history a bit

[magicant]

Thank you!