Remove fs-extra dependency

[GrahamCampbell]

No description provided.

[Copilot]

Pull request overview

This PR removes the fs-extra dependency by switching runtime filesystem utilities to built-in node:fs APIs and updating unit tests to use local test helpers for ensureDir / outputFile / remove.

Changes:

• Replace fs-extra usage in src/utils/fs/* with node:fs / node:fs.promises.
• Update unit tests to avoid fs-extra by introducing test/lib/fs.js helpers.
• Add a Windows symlink-skip helper + unit test to keep symlink-related tests stable on Windows environments.

Reviewed changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
test/unit/src/utils/glob.test.js	Switch test setup/teardown file ops from fs-extra to test/lib/fs helpers.
test/unit/src/utils/fs.test.js	Remove fs-extra, add sync existence + symlink edge-case tests, and use local fs helpers.
test/unit/src/utils/cache-hash.test.js	Replace fs-extra test file creation/cleanup with local helpers.
test/unit/src/state/LocalStateStorage.test.js	Replace fs-extra ensure/remove with local helpers.
test/unit/src/configuration/resolve-path.test.js	Replace fs-extra ensure/output/remove with local helpers.
test/unit/src/configuration/read.test.js	Replace fs-extra ensure/remove with local helpers.
test/unit/lib/skip-on-disabled-symlinks-in-windows.test.js	Add unit test coverage for the new Windows symlink-skip helper.
test/unit/components/framework/index.test.js	Replace fs-extra output/remove with local helpers in cache-hash related tests.
test/lib/skip-on-disabled-symlinks-in-windows.js	New helper to skip tests on Windows EPERM symlink failures.
test/lib/process-tmp-dir.js	Replace fs-extra removeSync with fs.rmSync.
test/lib/fs.js	New minimal replacements for fs-extra used in tests.
src/utils/fs/writeFile.js	Replace fs-extra.ensureDir/writeFile with fs.promises.mkdir/writeFile.
src/utils/fs/readFileSync.js	Replace fs-extra.readFileSync with fs.readFileSync.
src/utils/fs/readFile.js	Replace fs-extra.readFile with fs.promises.readFile.
src/utils/fs/fileExistsSync.js	Replace fs-extra.lstatSync with fs.lstatSync.
src/utils/fs/fileExists.js	Replace fs-extra.lstat with fs.promises.lstat.
package.json	Remove fs-extra from dependencies.

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