QUnit tests for whole Language Identifier logic

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

Running:
isUnicodeLetter.html

1. isUnicodeLetter.htmlRerun
2. StringHashMap.htmlRerun
3. ProfilingWriter.htmlRerun
4. LanguageProfile.htmlRerun
5. LanguageIdentifier.htmlRerun
6. LanguageIdentifierAddons.htmlRerun