chore(deps): audit deps, move several to devDependencies

[cwillisf]

Proposed Changes

Three categories of changes:

• A few deps were unused and have been removed
• Some webpack loaders are used only during build and have moved to devDependencies
• scratch-render exposes two loaders to library consumers when those consumers use the webpack export specifically. Those loaders were listed as dependencies, but it's more correct to list them as devDependencies (for scratch-render build) as well as optional peerDependencies (for webpack consumers)

Test Coverage

Covered by the existing build & test steps

[Copilot]

Pull request overview

This PR audits dependency declarations across the monorepo packages, removing unused packages and reclassifying build-time webpack loaders so that runtime consumers aren’t forced to install them.

Changes:

• Remove unused loader deps from scratch-vm and scratch-svg-renderer.
• Move build-only webpack loaders (and related tooling deps) in scratch-gui/scratch-render into devDependencies.
• For scratch-render, re-declare ify-loader/raw-loader as optional peer dependencies for consumers using the webpack export condition, and update package-lock.json accordingly.

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
packages/scratch-vm/package.json	Drops arraybuffer-loader from runtime dependencies.
packages/scratch-svg-renderer/package.json	Drops base64-loader from runtime dependencies.
packages/scratch-render/package.json	Moves ify-loader/raw-loader to devDeps and adds them as optional peer deps for webpack consumers.
packages/scratch-gui/package.json	Moves various build/test tooling and webpack loaders to devDependencies; removes react-redux from dependencies.
package-lock.json	Re-locks dependency graph to reflect dependency/devDependency/peerDependency changes.

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[Copilot]

react-redux is still imported throughout scratch-gui (e.g. many connect/Provider usages), but it has been removed from dependencies and is now only declared as a peerDependency. This is a behavioral change for consumers whose package manager does not auto-install peer deps (or has peer auto-install disabled): they will now get runtime/build failures unless they add react-redux explicitly. If this change is intentional, it should be called out as a breaking change in release notes; otherwise consider keeping react-redux as a direct dependency (while also keeping it as a peer to avoid duplicate React trees).

Suggested change

	"react-popover": "0.5.10",
	"react-popover": "0.5.10",
	"react-redux": "9.1.2",

[Copilot]

ify-loader and raw-loader are required by the webpack export path (inline !ify-loader! / raw-loader! usage in src/), but they are declared as optional peerDependencies. With this setup, webpack consumers who rely on the webpack condition can hit a build-time "module not found" without any peer-dep warning during install. Consider making these peer deps non-optional (and instead document that they’re only needed when using the webpack export), or add a clearer install-time signal via documentation/tooling so webpack consumers discover the requirement earlier.

Suggested change

	},
	"peerDependenciesMeta": {
	"ify-loader": {
	"optional": true
	},
	"raw-loader": {
	"optional": true
	}

[github-actions]

Test Results

    8 files  1 078 suites   12m 42s ⏱️
2 705 tests 2 697 ✅  8 💤 0 ❌
6 251 runs  6 212 ✅ 39 💤 0 ❌

Results for commit f51568c.

♻️ This comment has been updated with latest results.

[cwillisf]

I want to think more carefully about the peerDependencies situation before merging this. Also, this should probably be marked as a breaking change due to the scratch-render loaders at least, and maybe the react-redux change (depending on how I/we decide to handle the peerDependencies question).