feat(search): add missing RediSearch stemmer languages

[nkaradzhov]

This pull request adds the RediSearch stemmer languages that were missing from the REDISEARCH_LANGUAGE enum in @redis/search.

The following languages are supported by the RediSearch Snowball stemmer but were not exposed by the client, so they could not be passed to the LANGUAGE / LANGUAGE_FIELD options of FT.CREATE and FT.SEARCH in a type-safe way:

• Armenian
• Hindi
• Malay
• Serbian
• Tagalog
• Yiddish

Malay and Tagalog ship with the 8.10 query engine. Armenian, Hindi, Serbian and Yiddish were already listed as supported languages in the RediSearch stemming documentation.

Notes

• SEARCH.ts and every other command consume the shared RediSearchLanguage type, so they pick up the new values automatically.
• No behavior change for existing values; this is a purely additive change to the enum.
• Existing key spellings (CATALANA, INDONESAIN, NORWEIGAN) are left untouched to avoid a breaking change to the public enum keys.

🤖 Generated with Claude Code

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Note

Low Risk
Additive enum entries with no runtime or API behavior changes beyond expanded TypeScript autocomplete.

Overview
Extends REDISEARCH_LANGUAGE in @redis/search with six Snowball stemmer locales that RediSearch already supports but the client did not expose: Armenian, Hindi, Malay, Serbian, Tagalog, and Yiddish.

Because RediSearchLanguage is inferred from that enum, LANGUAGE / LANGUAGE_FIELD on FT.CREATE and related search commands can now reference these values with full type safety. Existing enum keys and string values are unchanged; this is additive typing only.

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