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/NodeLibrarySidebarTab.vue

@@ -75,11 +75,11 @@
         </Popover>
       </template>
       <template #header>
-        <div>
+        <div class="px-2 2xl:px-4">
           <SearchBox
             ref="searchBoxRef"
             v-model:model-value="searchQuery"
-            class="node-lib-search-box p-2 2xl:p-4"
+            class="node-lib-search-box"
             :placeholder="$t('g.searchNodes') + '...'"
             filter-icon="pi pi-filter"
             :filters