build: optimize SVG assets during production builds

[Puppo]

Description

Optimize SVG assets during production builds without rewriting committed sources.

• Optimize imported SVG components with Astro's SVGO optimizer.
• Optimize organization logos copied from public/ with vite-plugin-image-optimizer.
• Keep the favicon and fetched documentation SVGs outside the public-asset optimization scope.
• Reduce the 11 organization logos from 50,790 to 42,325 bytes (16.7%).

Verification

• npm ci
• npm run lint
• npm run check
• npm run build:website

Check List

• I have read the Contributing Guidelines