feat(typescript generator): added typescript generation by default

[Akash-Kumar-Sinha]

Update blueprint generation to use TypeScript (.ts) by default

Fix #32217

Currently, blueprint generation outputs files in JavaScript (.js).
This PR updates the blueprint generation mechanism to generate TypeScript (.ts) files by default.

Changes

• Newly generated blueprints use .ts files
• Project configuration (tsconfig, build, linting) is properly set up
• Generated code follows existing TypeScript conventions used in the project
• Backward compatibility is considered (migration path or opt-out if needed)

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