Release 1.0.0 (#284)

# Release 1.0.0

## Description
This PR prepares the release of version 1.0.0 of the design system
packages.

## Changes

- feat: color updates to the design tokens package
([#230](#230))

- `@metamask/design-tokens` package migrated from standalone repository
into the design system monorepo
([128](#128))

## Release Process Checklist
- [x] Branch named `release/1.0.0` created
- [x] Changelogs updated and validated
- [x] Dependencies updated to latest versions (`yarn constraints --fix
&& yarn && yarn dedupe`)
- [x] PR review and testing completed
- [x] Ready for "Squash & Merge" with commit message "Release 1.0.0"

## Post-Merge Steps
1. The `publish-release` GitHub Action will tag the release
2. NPM publishing requires approval from the `npm-publishers` team
3. Verify package publication on
[NPM](https://npms.io/search?q=scope%3Ametamask)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@metamask/metamask-design-system",
-  "version": "0.0.0",
+  "version": "1.0.0",
   "private": true,
   "description": "The MetaMask Design System monorepo",
   "repository": {

packages/design-tokens/CHANGELOG.md

@@ -7,9 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [4.2.0]
+
 ### Added
 
-- Migrate `@metamask/design-tokens` into the design system monorepo ([128](https://github.com/MetaMask/metamask-design-system/pull/128))
+- feat: color updates to the design tokens package ([#230](https://github.com/metamask/metamask-design-system/pull/230))
+
+- `@metamask/design-tokens` package migrated from standalone repository into the design system monorepo ([128](https://github.com/MetaMask/metamask-design-system/pull/128))
 
 ## [4.1.0]
 
@@ -312,9 +316,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Initial release.
 
-- Initial release.
-
-[Unreleased]: https://github.com/MetaMask/metamask-design-system/compare/@metamask/[email protected]
+[Unreleased]: https://github.com/MetaMask/metamask-design-system/compare/@metamask/[email protected]
+[4.2.0]: https://github.com/MetaMask/metamask-design-system/compare/@metamask/[email protected]...@metamask/[email protected]
 [4.1.0]: https://github.com/MetaMask/metamask-design-system/compare/@metamask/[email protected]...@metamask/[email protected]
 [4.0.0]: https://github.com/MetaMask/metamask-design-system/compare/@metamask/[email protected]...@metamask/[email protected]
 [3.0.0]: https://github.com/MetaMask/metamask-design-system/compare/@metamask/[email protected]...@metamask/[email protected]

packages/design-tokens/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@metamask/design-tokens",
-  "version": "4.1.0",
+  "version": "4.2.0",
   "description": "Design tokens to be used throughout MetaMask products",
   "keywords": [
     "MetaMask",