feat: update footer link formatting and add shadcn-nuxt integration

- Refactored footer.vue to improve link formatting.
- Updated nuxt.config.ts to include shadcn-nuxt and added necessary HTML attributes and meta tags for SEO.
- Added new dependencies in package.json for class-variance-authority, clsx, lucide-vue-next, reka-ui, shadcn-nuxt, tailwind-merge, and tailwindcss-animate.
- Cleaned up unused template tags in headlines.vue, index.vue, and news/[provider]/[slug].vue.
- Simplified sources.vue template structure.
- Improved login.vue styles for better animation.
- Enhanced google.ts API handler for better error handling and code clarity.
- Updated find/newsOrg.ts to ensure consistent code style.
- Added CSS variables and improved Tailwind configuration in main.css and tailwind.config.js.
- Created components.json for shadcn integration and added new UI components (Alert, Button, Progress) with respective styles and variants.
- Implemented utility functions in utils.ts for class name merging and value updating.

components/ui/progress/Progress.vue

@@ -0,0 +1,39 @@
+<script setup lang="ts">
+import { cn } from "@/lib/utils";
+import {
+  ProgressIndicator,
+  ProgressRoot,
+  type ProgressRootProps,
+} from "reka-ui";
+import { computed, type HTMLAttributes } from "vue";
+
+const props = withDefaults(
+  defineProps<ProgressRootProps & { class?: HTMLAttributes["class"] }>(),
+  {
+    modelValue: 0,
+  },
+);
+
+const delegatedProps = computed(() => {
+  const { class: _, ...delegated } = props;
+
+  return delegated;
+});
+</script>
+
+<template>
+  <ProgressRoot
+    v-bind="delegatedProps"
+    :class="
+      cn(
+        'relative h-2 w-full overflow-hidden rounded-full bg-primary/20',
+        props.class,
+      )
+    "
+  >
+    <ProgressIndicator
+      class="h-full w-full flex-1 bg-primary transition-all"
+      :style="`transform: translateX(-${100 - (props.modelValue ?? 0)}%);`"
+    />
+  </ProgressRoot>
+</template>