Upgrade to Yarn v4

[marcins]

Motivation

Apart from slightly faster yarn install speeds, the main benefit for us to upgrading to Yarn v4 is that we can use workspace:* dependencies in package.json files, which simplifies dependency management (especially for "big" PRs when there's a release on the main branch to merge in).

Changes

• Upgrade the repo to use Yarn v4
• Fix various small issues

The bulk of the change is changing explicit versions of workspace dependencies in package.json to workspace:*.

Checklist

• Testing a dev release bump in AFM
• Existing or new tests cover this change
• There is a changeset for this change, or one is not required
• Added documentation for any new features to the docs/ folder

[no-changeset]: No functional changes

[changeset-bot]

⚠️ No Changeset found

Latest commit: 8750a7d

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[github-actions]

📊 Type Coverage Report

Coverage Comparison

Metric	Baseline	Current	Change
Coverage Percentage	91.93%	91.93%	➡️ 0.00%
Correctly Typed	196,274	196,274	+0
Total Expressions	213,501	213,501	+0
Untyped Expressions	17,227	17,227	+0

Files with Most Type Issues (Top 15)

File	Issues	Affected Lines
packages/core/integration-tests/test/javascript.ts	983	648
packages/core/integration-tests/test/cache.ts	885	626
packages/core/integration-tests/test/scope-hoisting.ts	623	490
packages/utils/node-resolver-core/test/resolver.ts	476	177
packages/core/integration-tests/test/html.ts	468	294
packages/core/integration-tests/test/sourcemaps.ts	356	176
packages/core/test-utils/src/utils.ts	330	205
packages/core/integration-tests/test/incremental-bundling.ts	298	206
packages/core/core/src/dumpGraphToGraphViz.ts	251	108
packages/core/integration-tests/test/output-formats.ts	227	161
packages/transformers/webextension/src/WebExtensionTransformer.ts	210	80
packages/core/integration-tests/test/react-refresh.ts	197	71
packages/core/integration-tests/test/css-modules.ts	191	107
packages/core/core/src/requests/TargetRequest.ts	190	133
packages/core/integration-tests/test/babel.ts	187	115

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This report was generated by the Type Coverage GitHub Action

[mattcompiles]

@marcins Have you validated that the changesets release handles this correctly?