Add screenshot validation script

[codedbychavez]

Describe the purpose of your pull request

Add screenshot validation script to the docs. This script ensures that screenshots in new and updated documents comply with the screenshot guide.

Related issues (only if applicable)

• N/A

How to test? (only if applicable)

• What part of the application was affected by the changes?

1. A website/validate-document.js script was added.
2. A website/.validationignore file was added to ignore current .mdx files in the website/docs directory.
3. An automated workflow file was added in .github/workflows/validate-document.yml that would run each time a PR is created that contains new or modified .mdx files.

What should be tested?

1. Check if the script is works.

You can run it locally using:

node validate-document.js ./docs/integrations/segment.mdx

Requirement checklist

• I have validated my changes on a test/local environment.
• I have tested that the code snippets I added work. (Leave unchecked if there are no new code snippets.)
• I have added my changes to the V1 and V2 documentations.

[cloudflare-workers-and-pages]

Deploying configcat-docs with    Cloudflare Pages

Latest commit:	b97ddf4
Status:	✅  Deploy successful!
Preview URL:	https://ad579928.docs-xmy.pages.dev
Branch Preview URL:	https://add-screenshot-validation.docs-xmy.pages.dev

View logs