Implemented a custom password strength component

ref #106

src/components/auth/PasswordStrength.svelte

@@ -0,0 +1,14 @@
+<script>
+    import { getLocaleFromNavigator, _ } from "svelte-i18n";
+    import { passwordStrength } from "check-password-strength";
+    export let password_change;
+    $: strength = passwordStrength(password_change);
+</script>
+
+<div>
+    <ul>
+        {#if !strength.contains.includes('lowercase')}
+            <li>Must contain a lowercase letter</li>
+        {/if}
+    </ul>
+</div>