Add installation script

Also fix a typo in a JSON snippet in the README

README.md

@@ -60,6 +60,14 @@ Check out the [toy example](#toy-example) for a quick walk-through.
     - Workflows should be able to opt out of the extra pane
 
 ## Installation
+
+### Using a Script
+Run the following command in the terminal:
+```shell
+curl -sL https://raw.githubusercontent.com/mr-pennyworth/alfred-extra-pane/main/install.sh | sh
+```
+
+### Manual Installation
  - [Download](https://github.com/mr-pennyworth/alfred-extra-pane/releases/latest/)
    and extract `AlfredExtraPane.app.zip`.
  - Move the extracted `AlfredExtraPane.app` to `/Applications`.
@@ -259,7 +267,7 @@ Add the `customCSSFilename` key to the JSON config:
 ```json
 [{
   "alignment" : {"vertical" : {"placement" : "bottom", "height" : 600}},
-  "customUserAgent": "Mozilla/5.0 (Linux; Android 8.0; Pixel 2 Build/OPD3.170816.012) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Mobile Safari/537.36"
+  "customUserAgent": "Mozilla/5.0 (Linux; Android 8.0; Pixel 2 Build/OPD3.170816.012) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Mobile Safari/537.36",
   "customCSSFilename": "style.css"
 }]
 ```

install.sh

@@ -0,0 +1,37 @@
+#!/bin/sh
+
+# Exit immediately if a command exits with a non-zero status.
+set -e
+
+# Print commands and their arguments as they are executed.
+set -x
+
+REPO="https://github.com/mr-pennyworth/alfred-extra-pane"
+APP_NAME="AlfredExtraPane.app"
+LATEST_RELEASE_URL="$REPO/releases/latest/download/$APP_NAME.zip"
+TEMP_DIR="/tmp/alfred-extra-pane"
+APP_ZIP="$TEMP_DIR/$APP_NAME.zip"
+APP_PATH="/Applications/$APP_NAME"
+
+
+mkdir -p $TEMP_DIR
+
+echo "Downloading the latest release..."
+curl -L $LATEST_RELEASE_URL -o $APP_ZIP
+
+echo "Extracting the app..."
+unzip -q $APP_ZIP -d $TEMP_DIR
+
+echo "Moving the app to /Applications..."
+mv "$TEMP_DIR/$APP_NAME" /Applications/
+
+echo "Checking and removing the quarantine attribute if it exists..."
+if xattr -p com.apple.quarantine $APP_PATH > /dev/null 2>&1; then
+  xattr -d com.apple.quarantine $APP_PATH
+fi
+
+echo "Cleaning up..."
+rm -rf $TEMP_DIR
+
+echo "Installation complete."
+open /Applications