[D1] Centralising FAQs for D1 using partial files

[Oxyjun]

Summary

1. Now uses partials for FAQs inside Limits and Pricing pages.
2. Creates a new page FAQ under Reference which uses those partials to create a centralised FAQ page.
3. Renamed DO Frequently Asked Questions to FAQs, as specified in our style guide.

Screenshots (optional)

Documentation checklist

• The documentation style guide has been adhered to.
• If a larger change - such as adding a new page- an issue has been opened in relation to any incorrect or out of date information that this PR fixes.
• Files which have changed name or location have been allocated redirects.

[github-actions]

This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern	Owners
/src/content/docs/d1/	@elithrar, @rozenmd, @vy-ton, @joshthoward, @oxyjun, @harshil1712, @cloudflare/pcx-technical-writing
/src/content/docs/durable-objects/	@elithrar, @vy-ton, @joshthoward, @oxyjun, @harshil1712, @mikenomitch, @cloudflare/pcx-technical-writing, @cloudflare/workers-runtime-1
/src/content/partials/d1/	@elithrar, @rozenmd, @vy-ton, @joshthoward, @oxyjun, @harshil1712, @cloudflare/pcx-technical-writing

[github-actions]

Preview URL: https://8d067cda.preview.developers.cloudflare.com
Preview Branch URL: https://d1-jun-faq-consolidation.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/d1/platform/pricing/	https://d1-jun-faq-consolidation.preview.developers.cloudflare.com/d1/platform/pricing/
https://developers.cloudflare.com/d1/platform/limits/	https://d1-jun-faq-consolidation.preview.developers.cloudflare.com/d1/platform/limits/
https://developers.cloudflare.com/d1/reference/faq/	https://d1-jun-faq-consolidation.preview.developers.cloudflare.com/d1/reference/faq/
https://developers.cloudflare.com/d1/platform/alpha-migration/	https://d1-jun-faq-consolidation.preview.developers.cloudflare.com/d1/platform/alpha-migration/
https://developers.cloudflare.com/d1/platform/release-notes/	https://d1-jun-faq-consolidation.preview.developers.cloudflare.com/d1/platform/release-notes/
https://developers.cloudflare.com/d1/platform/storage-options/	https://d1-jun-faq-consolidation.preview.developers.cloudflare.com/d1/platform/storage-options/
https://developers.cloudflare.com/durable-objects/reference/faq/	https://d1-jun-faq-consolidation.preview.developers.cloudflare.com/durable-objects/reference/faq/