feat(pricing): enhance pricing page with SEO metadata and structured data

- Updated the pricing page to include improved SEO metadata, including title, description, and keywords.
- Added structured data using JsonLd for better search engine visibility.
- Revised pricing plan descriptions and features for clarity and accuracy.
- Enhanced link behavior for external pricing links to open in a new tab with appropriate security attributes.
- Updated FAQ sections to reflect changes in credit and billing explanations.

surfsense_web/components/pricing.tsx

@@ -205,6 +205,8 @@ export function Pricing({
 
 							<Link
 								href={plan.href}
+								target={plan.href.startsWith("http") ? "_blank" : undefined}
+								rel={plan.href.startsWith("http") ? "noopener noreferrer" : undefined}
 								className={cn(
 									buttonVariants({
 										variant: "outline",