chore(deps): add icon library and update preset configurations

Add dependencies and utility scripts for icon system:

## Dependencies (package.json)
- Add @lobehub/icons-static-svg@1.73.0
  - High-quality SVG icon library for AI providers
  - Source for extracted icons in src/icons/extracted/
- Update pnpm-lock.yaml accordingly

## Provider Preset Updates (src/config/claudeProviderPresets.ts)
- Add optional `icon` and `iconColor` fields to ProviderPreset interface
- Apply to Anthropic Official preset as example:
  - icon: "anthropic"
  - iconColor: "#D4915D"
- Future presets can include default icon configurations

## Utility Script (scripts/filter-icons.js) [NEW]
- Helper script for filtering and managing icon assets
- Supports icon discovery and validation workflow
- Complements extract-icons.js and generate-icon-index.js

This completes the icon system infrastructure, providing all
necessary tools and dependencies for icon customization.

pnpm-lock.yaml

@@ -41,6 +41,9 @@ importers:
       '@hookform/resolvers':
         specifier: ^5.2.2
         version: 5.2.2(react-hook-form@7.65.0(react@18.3.1))
+      '@lobehub/icons-static-svg':
+        specifier: ^1.73.0
+        version: 1.73.0
       '@radix-ui/react-checkbox':
         specifier: ^1.3.3
         version: 1.3.3(@types/react-dom@18.3.7(@types/react@18.3.23))(@types/react@18.3.23)(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
@@ -609,6 +612,9 @@ packages:
   '@lezer/markdown@1.6.0':
     resolution: {integrity: sha512-AXb98u3M6BEzTnreBnGtQaF7xFTiMA92Dsy5tqEjpacbjRxDSFdN4bKJo9uvU4cEEOS7D2B9MT7kvDgOEIzJSw==}
 
+  '@lobehub/icons-static-svg@1.73.0':
+    resolution: {integrity: sha512-ydKUCDoopdmulbjDZo/gppaODd5Ju5nPneVcN9A5dAz9IJZUMkLms8bqostMLrqcdMQ8resKjLuV9RhJaWhaag==}
+
   '@marijn/find-cluster-break@1.0.2':
     resolution: {integrity: sha512-l0h88YhZFyKdXIFNfSWpyjStDjGHwZ/U7iobcK1cQQD8sejsONdQtTVU+1wVN1PBw40PiiHB1vA5S7VTfQiP9g==}
 
@@ -2839,6 +2845,8 @@ snapshots:
       '@lezer/common': 1.2.3
       '@lezer/highlight': 1.2.1
 
+  '@lobehub/icons-static-svg@1.73.0': {}
+
   '@marijn/find-cluster-break@1.0.2': {}
 
   '@mswjs/interceptors@0.40.0':