add readme and install script

README.md

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+# caelestia-scripts
+
+A collection of scripts for my caelestia dotfiles.
+
+## Installation
+
+Run the `install.fish` script in the base of the repo.
+`~/.local/bin` must be in your path.
+
+## Usage
+
+```
+> caelestia help
+Usage: caelestia COMMAND [ ...args ]
+
+COMMAND := help | shell | toggle | workspace-action | scheme | screenshot | record | clipboard | clipboard-delete | emoji-picker | wallpaper | pip
+
+  help: show this help message
+  shell: start the shell or message it
+  toggle: toggle a special workspace
+  workspace-action: execute a Hyprland workspace dispatcher in the current group
+  scheme: change the current colour scheme
+  screenshot: take a screenshot
+  record: take a screen recording
+  clipboard: open clipboard history
+  clipboard-delete: delete an item from clipboard history
+  emoji-picker: open the emoji picker
+  wallpaper: change the wallpaper
+  pip: move the focused window into picture in picture mode or start the pip daemon
+```

install.fish

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+#!/bin/fish
+
+set -q XDG_CONFIG_HOME && set -l config $XDG_CONFIG_HOME/caelestia || set -l config ~/.config/caelestia
+set -l dist $config/scripts
+
+git clone https://github.com/caelestia-dots/scripts.git $dist
+mkdir -p ~/.local/bin
+ln -s $dist/main.fish ~/.local/bin/caelestia