Intial commit for standalone repo

This automated theme switching was not a good fit for the themes repo
so I made it into a standalone repo based on feedback from this pull
request: alacritty/alacritty-theme#74

AlacrittyAutoTheme.service

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+[Unit]
+Description=Alacritty automated theme switching based on Gnome system theme
+Require=dbus.service
+After=dbus.service
+
+[Service]
+ExecStart=/bin/bash /home/%u/.config/alacritty/alacritty-auto-theme/AlacrittyAutoTheme.sh
+Type=simple
+Restart=on-failure
+
+[Install]
+WantedBy=default.target

AlacrittyAutoTheme.sh

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+#!/bin/bash
+
+interface="org.freedesktop.portal.Settings"
+monitor_path="/org/freedesktop/portal/desktop"
+monitor_member="SettingChanged"
+count=0 #D-Bus fires the change event 4 times so we'll only act on it once
+
+dbus-monitor --profile "interface='$interface',path=$monitor_path,member=$monitor_member" |
+	while read line; do
+		let count++
+
+		if [ $count = 3 ]; then
+			theme="$(gsettings get org.gnome.desktop.interface color-scheme)"
+			if [[ "$theme" == "'prefer-dark'" ]]; then
+				#Need to set with full paths, goofy things are happening otherwise
+				echo "$(echo import = [ \'~/.config/alacritty/alacritty-auto-theme/dark_theme.toml\' ] > ~/.config/alacritty/alacritty-auto-theme/theme.toml)"
+			else
+				echo "$(echo import = [ \'~/.config/alacritty/alacritty-auto-theme/light_theme.toml\' ] > ~/.config/alacritty/alacritty-auto-theme/theme.toml)"
+			fi
+			count=0
+		fi 
+	done

README.md

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+# Alacritty Auto Theme Switcher
+
+## About
+[Alacritty](https://alacritty.org/) is a "fast, cross-platform, OpenGL terminal emulator" with [many themes available](https://github.com/alacritty/alacritty-theme), this project allows Alacritty theme to automatically change to a light/dark theme based on the current system theme. This only works for systems running Gnome and systemd (happy to receive contributions for other systems). 
+
+This is not affliated/supported by the Alacritty team, please report issues here and not to the Alacritty project.
+
+### Background
+Alacritty provides the ability for an user to define themes (or override parts of a theme). All of this is achieved via the `alacritty.toml` configuration file. With the switch to TOML, Alacritty allows the import of other `.toml` files that have themes defined, so it's easy to keep configuration separate from the current theme. Also if any of the configuration files are updated, the terminal windows will auto-reload (if `live_config_reload = true` is set). This functionality mkakes it possible to import a `theme.toml` file and update the contents of the file and have Alacritty change themes live. Unfortunately, Alacritty does not automatically follow the current system theme preference. 
+
+## Installation
+
+### Normal
+There are many ways to [install Alacritty](https://github.com/alacritty/alacritty/blob/master/INSTALL.md) and they also have [instructions for installing themes](https://github.com/alacritty/alacritty-theme?tab=readme-ov-file#installation) that are maintained by the Alacritty team. Once Alacritty is installed and working with your chosen theme: 
+``` sh
+cd ~/.config/alacritty/
+git clone https://github.com/shombando/alacritty-auto-theme.git
+```
+
+Now you can jump to the [Configuration](#Configuration) section.
+
+### Git submodule
+If you version control your Alacritty configuration as part of your dot files:
+``` sh
+cd ~/.config/alacritty/
+git submodule add https://github.com/shombando/alacritty-auto-theme.git
+git submodule update
+git submodule init
+```
+Consider making a fork of this repo so I ever change the default light/dark themes my changes don't overwrite your selection. I could not make those files part of the repo but wanted to make it easier to just install and try with minimal config.
+
+## Configuration
+Edit both the `light_theme.toml` and `dark-theme.toml` file and set it to one of the options from the themes directory (or paste in your color scheme directly in light/dark file) and include the following in your main `alacritty.toml` file:
+```toml
+import = [
+    "~/.config/alacritty/alacritty-auto-theme/theme.toml"
+]
+```
+>NOTE: Make sure that is the only time you're importing a theme. If you followed the directions for the alacritty-theme installation make sure you don't have that import still in your `alacritty.toml` file
+
+Then we'll install the systemd service, by opening a terminal in this current folder and running the following:
+``` sh
+cd ~/.config/alacritty/alacritty-auto-theme
+cp ./AlacrittyAutoTheme.service ~/.config/systemd/user/
+systemctl --user enable AlacrittyAutoTheme.service
+systemctl --user start AlacrittyAutoTheme.service
+```
+That's it, now when you switch your system theme, all Alacritty windows will also switch the respective light/dark themes you picked.
+
+## Alternate Usage
+Since this script is dependent on Gnome and systemd if you want to use it "manually" you can create an alias for switching to your preferred theme by calling `alacritty-light` or `alacritty-dark`: 
+``` sh
+alias alacritty-light="echo \"import = [ '.~/.config/alacritty/alacritty-auto-theme/light_theme.toml' ]\" > ~/.config/alacritty/alacritty-auto-theme/theme.toml"
+alias alacritty-dark="echo \"import = [ '.~/.config/alacritty/alacritty-auto-theme/dark_theme.toml' ]\" > ~/.config/alacritty/alacritty-auto-theme/theme.toml"
+```
+

dark_theme.toml

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+import = [ '~/.config/alacritty/themes/themes/nord.toml' ]

light_theme.toml

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+import = [ '~/.config/alacritty/themes/themes/pencil_light.toml' ]

theme.toml

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+import = [ '.~/.config/alacritty/alacritty-auto-theme/dark_theme.toml' ]