Add the installer, uninstaller, and generated docs

hooks/battery-low.sample

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+#!/bin/bash
+
+# This hook is called with the current battery percentage when the low battery
+# notification is sent. To put it into use, remove .sample from the name.
+
+SOUND_FILE="/usr/share/sounds/freedesktop/stereo/dialog-warning.oga"
+
+if blob-cmd-present mpv && [[ -f $SOUND_FILE ]]; then
+  mpv --no-video "$SOUND_FILE" >/dev/null 2>&1
+fi

hooks/font-set.sample

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+#!/bin/bash
+
+# This hook is called with the snake-cased name of the font that has just been set.
+# To put it into use, remove .sample from the name.
+
+# Example: Show the name of the theme that was just set.
+# notify-send -u low "New font" "Your new font is $1"

hooks/post-update.sample

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+#!/bin/bash
+
+# This hook is called after an Blob system update has been performed.
+# To put it into use, remove .sample from the name.
+
+# Example: Show notification after the system has been updated.
+# notify-send -u low "Update Performed" "Your system is now up to date"

hooks/theme-set.sample

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+#!/bin/bash
+
+# This hook is called with the snake-cased name of the theme that has just been set.
+# To put it into use, remove .sample from the name.
+
+# Example: Show the name of the theme that was just set.
+# notify-send -u low "New theme" "Your new theme is $1"