docs: Add READMEs for PKGBUILDs and install scripts

.archlinux/PKGBUILDs/README.md

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+# PKGBUILDs
+
+Here are my PKGBUILDs I use on Arch Linux. Each has a specific use case. I use PKGBUILDs to know exactly what I have on my machine, and to make it easier to sync changes across multiple Arch installations.
+
+Of course, you don't have to use **any** of these packages for your own installation, but if you want to use my setup, you probably want to use the packages I use as well.
+
+## Getting Started
+
+There are some **core packages** that need to be installed before anything else, listed below:
+
+- [tari-core](/.archlinux/PKGBUILDs/tari-core) - Core packages I use for many things
+- [tari-cli](/.archlinux/PKGBUILDs/tari-cli) - CLI programs that are nice to have
+- [tari-desktop](/.archlinux/PKGBUILDs/tari-desktop) - Packages I use common to all desktop environments
+
+### Add-on packages
+
+Now that everything is installed, it's just a matter of choosing a desktop environment or window manager. Note that you can install multiple DEs and WMs at once, then switch between them with your display manager.
+
+- [tari-gnome](/.archlinux/PKGBUILDs/tari-gnome) - The GNOME desktop environment, with GTK-related software
+- [tari-plasma](/.archlinux/PKGBUILDs/tari-plasma) - The Plasma desktop environment, with Qt and KDE-related software
+- [tari-bspwm](/.archlinux/PKGBUILDs/tari-bspwm) - The bspwm window manager, with optional Qt and GTK support (through `tari-gnome` and `tari-plasma`)
+
+Other window managers exist, but may not be trivial to use in non-traditional (HiDPI) environments.
+
+### Other packages
+
+- [tari-scripts](/.archlinux/PKGBUILDs/tari-scripts) - Color scripts, purely for aesthetics
+- [tari-util-xeventbind](/.archlinux/PKGBUILDs/tari-util-xeventbind) - Useful to change X DPI on resolution change
+
+TODO: More to come soon...

.archlinux/install-scripts/README.md

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+# Install Scripts
+
+Here are my Arch Linux install scripts. They are divided into 4 parts:
+
+1. Pre-install: Setting up the drive to install Arch on
+2. Install: Installing Arch Linux to that drive
+3. Configure: Writing some basic low-level config files
+4. Post-install: Post-install configuration
+
+I have one `install.sh` script that calls the first three scripts with the proper settings. The fourth script should be ran after a reboot. (TODO: Probably easier to run a subset of post-install commands in the installation media, + internet will already be covered, which allows us to clone this repository to the newly created home directory and run any other post-install commands on first boot... may also be useful to divide the install scripts a bit further to support more options).
+
+> **Note**: If you do not understand my install scripts, you should follow the [Installation guide][archguide] instead.
+
+## Setup
+
+> TODO...
+
+[archguide]: https://wiki.archlinux.org/index.php/Installation_guide