feat: migrate from archiso to artools — are you threatening me in SKECHERS?!

Strip out archiso (airootfs, efiboot, syslinux, mkarchiso, prepare.sh,
Dockerfile, mirrorlist, profiledef.sh, packages.x86_64, reset.sh,
run_before_squashfs.sh) and adopt artools buildiso with full antergos
iso-profiles. Bitch, you NEED therapy.

Are you threatening me?
- 154 files changed, 2804 insertions, 7352 deletions
- buildiso wrapper + iso-profiles/antergos/ (profile.yaml, root-overlay,
  live-overlay) + iso-profiles/common/common.yaml
- pacman.conf.d/iso-x86_64.conf with antergos-pkgs repo first

...Are you THREATENING me in SKECHERS?!
- Calamares offline + online module dirs, antergos-next branding
- componentName must match dir or Branding.cpp goes full T-square
- calamares before calamares-branding-antergos-next so --overwrite='*'
  wins correctly. YOU'RE ON YOUR FOURTH WIFE RIGHT NOW-
- calamares-next.desktop in live-overlay (/usr/share + /etc/skel/Desktop)
- netinstall.yaml bundled. No remote deps. Kill that bitch (Cnchi).

What fuckin' college would care if you drew some bullshit picture
about your feelings?
- CI: artixlinux/artixlinux:base container, install artools, buildiso -p
  antergos, IA upload with collection=open_source_software. Class is in
  session. Maybe I should grow 40 feet! Then you'd REALLY like me!
- IA: mediatype=software keeps us out of Community Texts jail. The
  question is; what's this stick gonna do?

It's honestly super humbling, when the trashiest repo you know;
probably coked out of its mind... says the most thoughtful thing
you've done in years.
- README.md rewritten with Artix/OpenRC/KDE badges, build instructions,
  migration notes. Nice SpongeBob impression. ...Nice SpongeBob impression.
- AGENTS.md updated (identity ritual, gotchas, commands, repo layout)
- Restore LICENSE, NOTICES, APOLOGY.txt, CHANGELOG.md from git history.
  Some files you just don't let die. No matter what, you NEVER use that
  N-word! (...should've said nothing.)
- .gitignore: work/ iso/ out/. Go work at Starbucks with your little apron.

So laugh all you want. Forget about me all you want. But at least
I'll be gorgeous forever. Mother, I'm in the SquashFS now.

Signed-off-by: Celestia Ludenberg <ash8820@proton.me>

pacman.conf.d/iso-x86_64.conf

@@ -0,0 +1,111 @@
+#
+# /etc/pacman.conf
+#
+# See the pacman.conf(5) manpage for option and repository directives
+
+#
+# GENERAL OPTIONS
+#
+[options]
+# The following paths are commented out with their default values listed.
+# If you wish to use different paths, uncomment and update the paths.
+#RootDir     = /
+#DBPath      = /var/lib/pacman/
+#CacheDir    = /var/cache/pacman/pkg/
+#LogFile     = /var/log/pacman.log
+#GPGDir      = /etc/pacman.d/gnupg/
+#HookDir     = /etc/pacman.d/hooks/
+HoldPkg     = pacman glibc
+#XferCommand = /usr/bin/curl -L -C - -f -o %o %u
+#XferCommand = /usr/bin/wget --passive-ftp -c -O %o %u
+#CleanMethod = KeepInstalled
+Architecture = auto
+
+# Pacman won't upgrade packages listed in IgnorePkg and members of IgnoreGroup
+#IgnorePkg   =
+#IgnoreGroup =
+
+#NoUpgrade   =
+#NoExtract   =
+
+# Misc options
+#UseSyslog
+Color
+#NoProgressBar
+CheckSpace
+VerbosePkgLists
+ParallelDownloads = 10
+DownloadUser = alpm
+#DisableSandboxFilesystem
+#DisableSandboxSyscalls
+
+# By default, pacman accepts packages signed by keys that its local keyring
+# trusts (see pacman-key and its man page), as well as unsigned packages.
+SigLevel    = Required DatabaseOptional
+LocalFileSigLevel = Optional
+#RemoteFileSigLevel = Required
+
+# NOTE: You must run `pacman-key --init` before first using pacman; the local
+# keyring can then be populated with the keys of all official Artix Linux
+# packagers with `pacman-key --populate artix`.
+
+#
+# REPOSITORIES
+#   - can be defined here or included from another file
+#   - pacman will search repositories in the order defined here
+#   - local/custom mirrors can be added here or in separate files
+#   - repositories listed first will take precedence when packages
+#     have identical names, regardless of version number
+#   - URLs will have $repo replaced by the name of the current repo
+#   - URLs will have $arch replaced by the name of the architecture
+#
+# Repository entries are of the format:
+#       [repo-name]
+#       Server = ServerName
+#       Include = IncludePath
+#
+# The header [repo-name] is crucial - it must be present and
+# uncommented to enable the repo.
+#
+
+# The gremlins repositories are disabled by default. To enable, uncomment the
+# repo name header and Include lines. You can add preferred servers immediately
+# after the header, and they will be used before the default mirrors.
+
+# [system-gremlins]
+# Include = /etc/pacman.d/mirrorlist
+
+[antergos-pkgs]
+SigLevel = Optional TrustAll
+Server = https://antergos-next.github.io/antergos-packages/
+
+[system]
+Include = /etc/pacman.d/mirrorlist
+
+# [world-gremlins]
+# Include = /etc/pacman.d/mirrorlist
+
+[world]
+Include = /etc/pacman.d/mirrorlist
+
+# [galaxy-gremlins]
+# Include = /etc/pacman.d/mirrorlist
+
+[galaxy]
+Include = /etc/pacman.d/mirrorlist
+
+# If you want to run 32 bit applications on your x86_64 system,
+# enable the lib32 repositories as required here.
+
+# [lib32-gremlins]
+# Include = /etc/pacman.d/mirrorlist
+#
+[lib32]
+Include = /etc/pacman.d/mirrorlist
+
+# An example of a custom package repository.  See the pacman manpage for
+# tips on creating your own repositories.
+#[custom]
+#SigLevel = Optional TrustAll
+#Server = file:///home/custompkgs
+