refactor: separation of shared components

src/components/ui/PhoneInput/PhoneInput.module.css

@@ -0,0 +1,16 @@
+.country-select {
+    font-size: medium;
+    @mixin light {
+        color: black;
+    }
+    @mixin dark {
+        color: white;
+    }
+}
+
+.country-search input {
+    @mixin dark {
+        background-color: var(--mantine-color-dark-6);
+    }
+    border-radius: 15px;
+}