chore(platform): set the version back to 0.1.0 so the publish workflow bumps it

[amitbardos]

Sets @base44/platform back to the published 0.1.0, so manual-publish.yml can bump it to 0.2.0 itself.

The workflow runs npm version <input>, publishes, then commits the bump and tags platform-v<version>. With package.json already at 0.2.0 (from #313), version: 0.2.0 fails with "Version not changed" and leaves nothing to commit, and version: minor would publish 0.3.0.

Changes packages/platform/package.json and the packages/platform entry in package-lock.json. CHANGELOG.md keeps its 0.2.0 section, and gains a "Server entrypoint" subsection for #316 (@base44/platform/server and createPlatformServer), which also ships in 0.2.0.

After merging: Actions → Manual Package Publish → Run workflow with package: platform, version: minor, npm_tag: latest. Do a dry_run: true run first; its log should show "Version: 0.2.0".

🤖 Generated with Claude Code

[github-actions]

🚀 Package Preview Available! (@base44/platform)

---

Install this PR's preview build with npm:

npm i @base44-preview/platform@0.1.0-pr.332.00d7174

Prefer not to change any import paths? Install using npm alias so your code still imports @base44/platform:

npm i "@base44/platform@npm:@base44-preview/platform@0.1.0-pr.332.00d7174"

Or add it to your package.json dependencies:

{
  "dependencies": {
    "@base44/platform": "npm:@base44-preview/platform@0.1.0-pr.332.00d7174"
  }
}

• 📦 Preview Package: @base44-preview/platform@0.1.0-pr.332.00d7174
• 🔗 View this commit on GitHub

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_{Preview published to npm registry — try new features instantly!}

[github-actions]

🚀 Package Preview Available!

---

Install this PR's preview build with npm:

npm i @base44-preview/sdk@0.8.54-pr.332.00d7174

Prefer not to change any import paths? Install using npm alias so your code still imports @base44/sdk:

npm i "@base44/sdk@npm:@base44-preview/sdk@0.8.54-pr.332.00d7174"

Or add it to your package.json dependencies:

{
  "dependencies": {
    "@base44/sdk": "npm:@base44-preview/sdk@0.8.54-pr.332.00d7174"
  }
}

• 📦 Preview Package: @base44-preview/sdk@0.8.54-pr.332.00d7174
• 🔗 View this commit on GitHub

---

_{Preview published to npm registry — try new features instantly!}