You can group config files like a folder to declutter your vscode file explorer, here is my take for sveltekit.

VSCodeFileNesting.md

VSCode File Nesting / File Grouping

If you go to your VSCode defaultSettings.json you'll see explorer.fileNesting.patterns key, turns out VSCode can group files based on some patterns.

Here is that section;

	// Controls nesting of files in the Explorer. `explorer.fileNesting.enabled` must be set for this to take effect. Each __Item__ represents a parent pattern and may contain a single `*` character that matches any string. Each __Value__ represents a comma separated list of the child patterns that should be shown nested under a given parent. Child patterns may contain several special tokens:
	// - `${capture}`: Matches the resolved value of the `*` from the parent pattern
	// - `${basename}`: Matches the parent file's basename, the `file` in `file.ts`
	// - `${extname}`: Matches the parent file's extension, the `ts` in `file.ts`
	// - `${dirname}`: Matches the parent file's directory name, the `src` in `src/file.ts`
	// - `*`:  Matches any string, may only be used once per child pattern
	"explorer.fileNesting.patterns": {
		"*.ts": "${capture}.js",
		"*.js": "${capture}.js.map, ${capture}.min.js, ${capture}.d.ts",
		"*.jsx": "${capture}.js",
		"*.tsx": "${capture}.ts",
		"tsconfig.json": "tsconfig.*.json",
		"package.json": "package-lock.json, yarn.lock, pnpm-lock.yaml"
	},

As you can see some predefined patterns are there.

Since I'm mostly working on Svelte projects, here are the patterns I prepared & wrote in my (user) settings.json.

So I've extended package.json definition and groupped some standart files that are exists in sveltekit project that you wouldn't mingle much.

  "explorer.fileNesting.patterns": {
    "svelte.config.js": "tsconfig.json, jsconfig.json, tailwind.config.cjs, postcss.config.cjs, vite.config.js, playwright.config.js, .prettierrc, .prettierignore, .eslintrc.cjs, .eslintignore",
    "package.json": "package-lock.json, yarn.lock, pnpm-lock.yaml, .npmrc, .gitignore, *.code-workspace",
    "app.html": "app.d.ts, app.css"
  }

In order to activate this feature;

You can either go and add this line to your settings.json "explorer.fileNesting.enabled": true

or

Open settings pane (command + , for me) and search for File Nesting, then enable it.

^{Big thanks to Rodney for his blog post}