Use esbuild for bundle-size measurements

[Jason Morse (JasonVMo)]

Summary

• replace the Metro-based bundle-size path with direct esbuild bundles using platform-aware extension resolution
• externalize React, React Native runtimes, React Native SVG, and SVGO while removing the shell profile and refreshing the baseline
• merge macOS and Windows measurements by scenario in terminal, Markdown, pipeline summary, and PR comment output
• validate generated reports in both the PR job and trusted fork/Dependabot comment workflow

Validation

• yarn workspace @fluentui-react-native/bundle-size test
• yarn workspace @fluentui-react-native/bundle-size lint
• yarn workspace @fluentui-react-native/bundle-size format
• yarn bundle-size
• yarn workspace @fluentui-react-native/bundle-size validate-report
• yarn lint-lockfile
• yarn check-publishing
• yarn lint-repo

[github-actions]

Bundle size report

Tree-shaken, minified production esbuild bundles with React and React Native runtimes externalized.

Scenario	Modules-Mac (Δ)	Modules-Win (Δ)	Size-Mac (Δ)	Size-Win (Δ)
components-button	62 (New)	63 (New)	49.94k (New)	49.87k (New)
components-catalog	159 (New)	160 (New)	155.26k (New)	155.19k (New)
design-theme-state	33 (New)	34 (New)	30.11k (New)	30.03k (New)
design-themed-root	37 (New)	38 (New)	32.07k (New)	32.00k (New)
design-color-lib	6 (New)	6 (New)	6.33k (New)	6.33k (New)
design-theme-state-legacy-source	34 (New)	35 (New)	31.77k (New)	31.69k (New)
design-legacy-theme-from-flex	57 (New)	58 (New)	97.72k (New)	97.59k (New)

The job is advisory: size changes are reported but do not fail the pull request. Bundle or analysis errors still fail.

---

View bundle-size workflow run