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>

tests-ui/platform/assets/components/AssetBrowserModal.test.ts

@@ -35,7 +35,7 @@ vi.mock('@/stores/modelToNodeStore', () => ({
   })
 }))
 
-vi.mock('@/components/input/SearchBox.vue', () => ({
+vi.mock('@/components/common/SearchBox.vue', () => ({
   default: {
     name: 'SearchBox',
     props: ['modelValue', 'size', 'placeholder', 'class'],