chore: prepare v9.3.8 release

[ibgreen]

Summary

• prepare the new 9.3-release maintenance line for v9.3.8
• point release-branch source links and examples at the 9.3 line
• add the v9.3.8 changelog, led by the editable-layers Turf import fix
• align the website with Turf 7 so the corrected named imports resolve during documentation builds

Why

Igor's editable-layers fix is the final pre-WebGPU commit on master and needs a 9.3 patch release. The website still resolved Turf 6.5, whose packages expose only default exports, while editable-layers correctly targets Turf 7 and now uses its named exports.

Impact

This PR changes release-branch wiring and dependency metadata only. It does not include the WebGPU or wind commits that follow 06251b42.

Validation

• yarn
• yarn lint
• yarn build
• yarn test — 163 files, 1,381 tests passed, 9 skipped
• direct CJS Turf-backed mode smoke test
• esbuild-to-CJS Turf-backed mode smoke test
• cd website && yarn && yarn build
• verified the branch contains 06251b42 and excludes 0726d08a

[github-actions]

Coverage

Stmts: 50.82% ▼-0.20% | Branch: 41.93% ▼-0.18% | Funcs: 49.20% ▼-0.01% | Lines: 50.96% ▼-0.17%

Test Files 163 passed (163)

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Preserve blob routes for source-file links

When readers click this source link, GitHub receives a /tree/9.3-release/.../view-mode.ts URL, but /tree/ addresses directories rather than files, so it does not open the referenced source file. This replacement changes every previously valid /blob/master/... file link in these API pages the same way; retain /blob/9.3-release/ for file targets while using /tree/ only for directories.

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