MiKo_2082 is now aware of 'warning' and some other nouns

[RalfKoban]

• Enhanced the ArticleProvider to include a new overload for GetArticleFor that accepts ReadOnlySpan<char>.
• Improved pluralization logic in Pluralizer by introducing SingularOrPluralEndings and a new method IsSingularAndPlural.
• Updated Verbalizer to better detect gerund verbs by checking against a list of nouns with gerund endings.
• Modified MiKo_2082_CodeFixProvider to refine plural detection and article retrieval logic.
• Added comprehensive tests for the new noun detection in VerbalizerTests.
• Extended MiKo_2082_EnumMemberAnalyzerTests with additional test cases for special phrases and documentation fixes.