feat: adding pluralizer util. fix: measurement unit in marker popup

src/core/utils/string.ts

@@ -0,0 +1,31 @@
+interface PluralForms {
+  one: string;
+  other: string;
+  [key: string]: string;
+}
+
+interface FormatOptions {
+  locale?: string;
+  pluralRules?: Intl.PluralRulesOptions;
+  numberFormat?: Intl.NumberFormatOptions;
+}
+
+export function formatQuantity(
+  value: number,
+  forms: PluralForms,
+  options: FormatOptions = {},
+) {
+  const {
+    locale = "en-US",
+    pluralRules: pluralOptions = { type: "cardinal" },
+    numberFormat: numberOptions = {},
+  } = options;
+
+  const pluralRules = new Intl.PluralRules(locale, pluralOptions);
+  const numberFormat = new Intl.NumberFormat(locale, numberOptions);
+
+  const pluralCategory = pluralRules.select(value);
+  const word = forms[pluralCategory];
+
+  return `${numberFormat.format(value)} ${word}`;
+}