fix(transformer): preserve suffix when variable name is entirely css/style(s)

Use a positive lookbehind assertion in the regex pattern to only remove the suffix if it's preceded by a word character. This prevents stripping suffixes from variables that consist entirely of these names.

Author: kh4f

packages/rawstyle/src/transformer.ts

@@ -45,7 +45,7 @@ export const transform = (file: string, source: string): TransformResult => {
 				rep = '""'
 			} else {
 				if (!activeVarName) return
-				const clName = `${activeVarName.replace(/css|styles?$/i, '')}_${fileHash}`
+				const clName = `${activeVarName.replace(/(?<=\w)(css|styles?$)/i, '')}_${fileHash}`
 				css += `.${clName} {${cssTpl}}`
 				rep = `'${clName}'`
 			}