Meetup list improvements

[wackerow]

Description

• Fixes namespace bug causing "no results" strings to be broken
• Cleans up emoji fields inside community-meetups.json to remove uses of two-character region codes or emojis, and utilize full region names instead (which parse to the same flags that were already shown).
• Expanded the filtering/searching to take advantage of these region names, allowing a user to search by a country name

Preview URL:

https://deploy-preview-13216--ethereumorg.netlify.app/en/community/events/#meetups

Screenshots

Related Issue

https://ethereum.org/en/community/events/

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