docs: document Premium Geo DB add-on

[atharva-appwrite]

Summary

• add a dedicated billing guide for the Appwrite Cloud Premium Geo DB add-on
• document eligibility, project Settings enablement, prorated billing, and payment confirmation
• explain pending, active, scheduled removal, disable, and re-enable lifecycle behavior
• add the guide to the Billing overview and sidebar navigation

References

• feat: add Premium Geo DB addon to project settings console#2981
• fix: handle webhook-race on Premium Geo DB addon enable console#3123

Validation

• bunx prettier --check src/routes/docs/advanced/billing/+layout.svelte
• git diff --check
• set -a && source .env.example && set +a && bun run check (0 errors, 0 warnings)

[appwrite]

Appwrite Website

Project ID: 69d7efb00023389e8d27

Sites (1)

Site	Status	Logs	Preview	QR
website 69d7f2670014e24571ca	Ready	View Logs	Preview URL

Website (appwrite/website)

Project ID: 684969cb000a2f6c0a02

Sites (1)

Site	Status	Logs	Preview	QR
website 68496a17000f03d62013	Processing	View Logs	Preview URL

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[greptile-apps]

Greptile Summary

This PR documents the Premium Geo DB billing add-on. The main changes are:

• A new Billing guide page for Premium Geo DB.
• A new card on the Billing overview page.
• A new sidebar link in the Billing add-ons section.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the changed code.

Important Files Changed

Filename	Overview
src/routes/docs/advanced/billing/+layout.svelte	Adds a Premium Geo DB sidebar link that matches the new docs route.
src/routes/docs/advanced/billing/+page.markdoc	Adds a Billing overview card that links to the new Premium Geo DB guide.
src/routes/docs/advanced/billing/premium-geo-db/+page.markdoc	Adds the Premium Geo DB guide with standard article frontmatter and Markdoc syntax.

_{Reviews (1): Last reviewed commit: "docs: document Premium Geo DB add-on" | Re-trigger Greptile}