chore(deps): upgrade Svelte to v5.45.6

[ascorbic]

Summary

• Update @unpic/svelte devDependency from ^5.19.0 to ^5.45.6
• Update examples/svelte from ^5.0.0 to ^5.45.6

Test plan

• All package builds pass (pnpm run build:packages)
• All tests pass (pnpm run test)

🤖 Generated with Claude Code

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Latest commit: 8e04210

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@unpic/angular

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commit: b5e828f