feat: Auto-generate sample JSON data from Concerto model

[hemantch01]

Closes #766

Added an button to the JSON Data panel that auto-generates sample JSON from the current Concerto model, populating the data editor with well-typed placeholder values.

Changes

• Added src/utils/generateSampleData.ts utility that introspects Concerto models and generates typed sample data (String, Integer, Double, Boolean, DateTime, enums, nested concepts, arrays)
• Added generateSampleDataFromModel() action to Zustand store in src/store/store.ts
• Added generate button in JSON Data header in src/pages/MainContainer.tsx
• Added Approx 9 unit tests in src/tests/utils/generateSampleData/generateSampleData.test.ts

Screenshots or Video

[netlify]

✅ Deploy Preview for ap-template-playground ready!

Name	Link
🔨 Latest commit	fcf58d7
🔍 Latest deploy log	https://app.netlify.com/projects/ap-template-playground/deploys/69a5c27bab270f0008a739ad
😎 Deploy Preview	https://deploy-preview-767--ap-template-playground.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[hemantch01]

hi @sanketshevkar any feed back for this ??