Create @woocommerce/admin-layout package (#37094)

* Initial admin-layout package skeleton

* Changelog files

* Use createOrderedChildren and sortFillsByOrder from @woocommerce/components for WooFooterItem

* Move WooFooterItem to @woocommerce/admin-layout

* Use WooFooterItem from @woocommerce/admin-layout

* Suppress errant TS lint errors

* Exports for @woocommerce/admin-layout

* Fill updates and eslint suppression

* Changelogs

* Remove suppression of tslint errors

* Fix react and @types/react versions

* Load @woocommerce/admin-layout script and styles

* Move WooHeaderItem, WooHeaderNavigationItem, and WooHeaderPageTitle to @woocommerce/admin-layout

* Regenerate lock file post-rebase

* Remove duplicate import post-rebase

* Add wc-admin-layout to app style dependency

* Fix jest mock of @woocommerce/admin-layout

* Fix spacing.

* Export slot names

* Fix typo in .npmrc

* Update lock file

* Try updating lock file

* Update lock file

* Update lock file

* Update to latest lock file from trunk

* Update lock file

* Sync dependencies of @woocommerce/admin-layout

* Manually sync @WordPress dependencies

packages/js/admin-layout/.npmrc

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+package-lock=false

packages/js/admin-layout/README.md

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+# Admin Layout
+
+A collection of WooCommerce Admin layout components and utilities.
+
+## Installation
+
+Install the module
+
+```bash
+pnpm install @woocommerce/product-editor --save
+```

packages/js/admin-layout/changelog.md

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+# Changelog
+
+This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

packages/js/admin-layout/changelog/add-admin-layout-package

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+Significance: minor
+Type: dev
+
+Create @woocommerce/admin-layout package to house header, footer, and similar components and utilities.

packages/js/admin-layout/composer.json

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+{
+	"name": "woocommerce/admin-layout",
+	"description": "WooCommerce Admin layout component library",
+	"type": "library",
+	"license": "GPL-3.0-or-later",
+	"minimum-stability": "dev",
+	"require-dev": {
+		"automattic/jetpack-changelogger": "3.3.0"
+	},
+	"config": {
+		"platform": {
+			"php": "7.2"
+		}
+	},
+	"extra": {
+		"changelogger": {
+			"formatter": {
+				"filename": "../../../tools/changelogger/class-package-formatter.php"
+			},
+			"types": {
+				"fix": "Fixes an existing bug",
+				"add": "Adds functionality",
+				"update": "Update existing functionality",
+				"dev": "Development related task",
+				"tweak": "A minor adjustment to the codebase",
+				"performance": "Address performance issues",
+				"enhancement": "Improve existing functionality"
+			},
+			"changelog": "CHANGELOG.md"
+		}
+	}
+}