feat: add new GH actions + PPG management API workflow guide

[ankur-arch]

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[github-actions]

Dangerous URL check

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No local URLs found.

[github-actions]

Redirect check

This PR probably requires the following redirects to be added to static/_redirects:

• This PR does not change any pages in a way that would require a redirect.

[github-actions]

original	preview
content/800-guides/330-github-actions.mdx	content/800-guides/330-github-actions.mdx
content/250-postgres/1200-more/1000-faq.mdx	content/250-postgres/1200-more/1000-faq.mdx

[github-actions]

Images automagically compressed by Calibre's image-actions ✨

Compression reduced images by 17.5%, saving 60.05 KB.

Filename	Before	After	Improvement	Visual comparison
static/img/guides/prisma-postgres-github-actions-cover.png	343.04 KB	282.99 KB	-17.5%	View diff

196 images did not require optimisation.

[cloudflare-workers-and-pages]

Deploying docs with    Cloudflare Pages

Latest commit:	4bd54af
Status:	✅  Deploy successful!
Preview URL:	https://5c40831c.docs-51g.pages.dev
Branch Preview URL:	https://dc-4420-github-actions-guide.docs-51g.pages.dev

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[github-actions]

Images automagically compressed by Calibre's image-actions ✨

Compression reduced images by 23.2%, saving 96.89 KB.

Filename	Before	After	Improvement	Visual comparison
static/img/guides/github-comment.png	77.79 KB	39.52 KB	-49.2%	View diff
static/img/guides/prisma-postgres-github-actions-cover.png	339.89 KB	281.27 KB	-17.2%	View diff

196 images did not require optimisation.