add tailwindcss language identifier

this commit adds the tailwindcss language identifier to the list of supported languages. The TailwindCSS intellisense extension maps all files with the .css extension to the tailwindcss language, which would prevent formatting

src/constants.ts

@@ -90,6 +90,7 @@ export const supportedLanguageIdentifiers: string[] = [
 	"json",
 	"jsonc",
 	"svelte",
+	"tailwindcss",
 	"typescript",
 	"typescriptreact",
 	"vue",