Moved code into src folder. Added build for component library.

src/components/common/ErrorMessage.module.css

@@ -0,0 +1,15 @@
+.error {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+  margin: auto;
+  display: flex;
+  background-color: var(--base50);
+  padding: 10px;
+  z-index: 1;
+}
+
+.icon {
+  margin-right: 10px;
+}