refactor(shared/ui): stop deep-importing sibling config/types (C-3)

Badge and TechText reached into $shared/ui/Label/config, and SearchBar into
$shared/ui/Input/types — bypassing the siblings public surface.

- Label/config.ts was explicitly shared text-styling config, not Labels
  internals; relocate it to shared/ui/labelConfig.ts (a neutral peer module)
  and point Label/Badge/TechText at it relatively.
- inputIconSize is a consumer-facing map; export it from Input/index.ts so
  SearchBar imports it through the barrel alongside Input.

src/shared/ui/Badge/Badge.svelte

@@ -4,12 +4,12 @@
 -->
 <script lang="ts">
 import { cn } from '$shared/lib';
+import type { Snippet } from 'svelte';
+import type { HTMLAttributes } from 'svelte/elements';
 import {
     type LabelSize,
     labelSizeConfig,
-} from '$shared/ui/Label/config';
-import type { Snippet } from 'svelte';
-import type { HTMLAttributes } from 'svelte/elements';
+} from '../labelConfig';
 
 type BadgeVariant = 'default' | 'accent' | 'success' | 'warning' | 'info';