Style: Larger Node Text, More Sidebar Alignment (#7223)

## Summary

See what it looks like. How it feels. What do you think?

- Also was able to unify down to a single SearchBox component.

## Changes

- Bigger widget / slot labels
- Smaller header text
- Unified Searchboxes across sidebar tabs

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7223-Style-prototype-with-larger-node-text-2c36d73d365081f8a371c86f178fa1ff)
by [Unito](https://www.unito.io)

---------

Co-authored-by: github-actions <github-actions@github.com>

src/components/sidebar/tabs/ModelLibrarySidebarTab.vue

@@ -17,17 +17,19 @@
       />
     </template>
     <template #header>
-      <SearchBox
-        ref="searchBoxRef"
-        v-model:model-value="searchQuery"
-        class="model-lib-search-box p-2 2xl:p-4"
-        :placeholder="$t('g.searchModels') + '...'"
-        @search="handleSearch"
-      />
+      <div class="px-2 2xl:px-4">
+        <SearchBox
+          ref="searchBoxRef"
+          v-model:model-value="searchQuery"
+          :placeholder="$t('g.searchModels') + '...'"
+          @search="handleSearch"
+        />
+      </div>
     </template>
     <template #body>
       <ElectronDownloadItems v-if="isElectron()" />
 
+      <Divider type="dashed" class="m-2" />
       <TreeExplorer
         v-model:expanded-keys="expandedKeys"
         class="model-lib-tree-explorer"
@@ -43,6 +45,7 @@
 </template>
 
 <script setup lang="ts">
+import { Divider } from 'primevue'
 import Button from 'primevue/button'
 import { computed, nextTick, onMounted, ref, toRef, watch } from 'vue'