[INT-22] pdf: add example scripts and README (#796)

* [INT-22] pdf: add example scripts and README

* [INT-22] pdf: update package version and link in readme

* [INT-22] pdf: merge request suggestions

* [INT-22] pdf: remove TODO comment

Author: perf2711

pdf/README.md

@@ -0,0 +1,35 @@
+# Creating PDF snapshots
+
+## Prerequisites
+
+-   NodeJS 18
+-   Sauce Labs Account
+
+## Run the demo
+
+-   Install `npm` dependencies:
+    ```
+    npm install
+    ```
+-   Configure with your Sauce credentials from https://app.saucelabs.com/user-settings :
+    ```sh
+    export SAUCE_USERNAME=__YOUR_SAUCE_USER_NAME__
+    export SAUCE_ACCESS_KEY=__YOUR_SAUCE_ACCESS_KEY__
+    export SAUCE_REGION=__YOUR_REGION_NAME__ # default - us-west-1
+    ```
+-   Upload baseline snapshots:
+    ```
+    npm run sauce-visual
+    ```
+-   Review your snapshots by clicking on the URL printed in the test, or go to https://app.saucelabs.com/visual/builds.
+-   Accept uploaded diffs, so they become new baselines.
+-   Re-run the tests:
+    ```
+    npm run sauce-visual-check
+    ```
+-   Open the test or go to https://app.saucelabs.com/visual/builds to review changes.
+-   The changes should be detected and differences displayed between the two runs.
+
+## Installation and usage
+
+View installation and usage instructions on the [Sauce Docs website](https://docs.saucelabs.com/visual-testing/integrations/snapshots-cli/).