feat: Specific OG description for each event

[CactusPuppy]

• build: Add marked and sanitize-html for granular string control
• chore: Add markdownToPlaintext helper function
• feat: Add unique OG description for each event

[vercel[bot]]

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Name	Status	Preview	Comments	Updated
ow2countdown	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Jan 27, 2023 at 11:17PM (UTC)