Update Playground and PHP-WASM packages to 3.1.13

[wojtekn]

Related issues

• N/A

How AI was used in this PR

Claude Code updated all @wp-playground and @php-wasm package versions from 3.1.12 to 3.1.13 across the monorepo.

Proposed Changes

• @php-wasm/node, @php-wasm/universal, @php-wasm/util → 3.1.13
• @wp-playground/blueprints, @wp-playground/cli, @wp-playground/common, @wp-playground/storage, @wp-playground/wordpress → 3.1.13

Testing Instructions

• Run npm run cli:build && node apps/cli/dist/cli/main.js and verify the CLI works
• Start the app with npm start and verify local sites load correctly

Pre-merge Checklist

• Have you checked for TypeScript, React or other console errors?

[wpmobilebot]

📊 Performance Test Results

Comparing 9d094af vs trunk

app-size

Metric	trunk	9d094af	Diff	Change
App Size (Mac)	1237.43 MB	1237.45 MB	+0.02 MB	⚪ 0.0%

site-editor

Metric	trunk	9d094af	Diff	Change
load	1937 ms	1918 ms	19 ms	⚪ 0.0%

site-startup

Metric	trunk	9d094af	Diff	Change
siteCreation	7080 ms	6140 ms	940 ms	🟢 -13.3%
siteStartup	3934 ms	3940 ms	+6 ms	⚪ 0.0%

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Results are median values from multiple test runs.

Legend: 🟢 Improvement (faster) | 🔴 Regression (slower) | ⚪ No change (<50ms diff)