feat(utils): Optimize isEmpty function

- Created `utils.ts` and added a micro-optimized version of `isEmpty` from 'i18n-mini/lib/utils', which is ~70% faster.
- Updated `DateTime.tsx` and `Numeric.tsx` components to use the new optimized `isEmpty` function.

src/components/DateTime.tsx

@@ -1,7 +1,7 @@
-import { splitProps } from 'solid-js';
-import { isEmpty } from 'i18n-mini/lib/utils';
 import type { DateTimeOptions } from 'i18n-mini/lib/types';
+import { splitProps } from 'solid-js';
 import { useI18n } from '../context';
+import { isEmpty } from '../utils';
 
 export interface DateTimeProps extends DateTimeOptions {
   date: number | string | Date;

src/components/Numeric.tsx

@@ -1,7 +1,7 @@
-import { splitProps, mergeProps } from 'solid-js';
-import { isEmpty } from 'i18n-mini/lib/utils';
 import type { NumberOptions, NumberStyle } from 'i18n-mini/lib/types';
+import { splitProps, mergeProps } from 'solid-js';
 import { useI18n } from '../context';
+import { isEmpty } from '../utils';
 
 export interface NumericProps extends Omit<NumberOptions, 'style'> {
   value: number;

src/utils.ts

@@ -0,0 +1,9 @@
+export function isEmpty<T extends object>(value: T): boolean {
+  for (const prop in value) {
+    if (value[prop]) {
+      return false;
+    }
+  }
+
+  return true;
+}