fix: resolve build failures for intelligent-data-chart-generator, hello-world-tab-with-backend, and todo-list-with-Azure-backend-M365

[qfai]

Summary

This PR fixes build failures in three samples that were causing E2E tests to fail.

Changes

1. intelligent-data-chart-generator/api

• Problem: TypeScript compilation fails with 59 errors due to `@types/node@25` (transitive dependency from `mssql`) being incompatible with TypeScript 4.9.5
• Fix:
  • Add `@types/node@^20.17.12` explicitly to pin compatible version
  • Upgrade TypeScript from `^4.9.5` to `^5.6.3`
  • Update tsconfig.json to use `module: NodeNext` and `target: ES2022`

2. hello-world-tab-with-backend/api

• Problem: TypeScript compilation fails with 99 errors (Cannot find namespace 'NodeJS', Cannot find name 'Buffer', etc.)
• Fix:
  • Add `@types/node@^20.17.12`
  • Upgrade TypeScript from `^4.4.4` to `^5.6.3`
  • Update tsconfig.json to use `module: NodeNext` and `target: ES2022`

3. todo-list-with-Azure-backend-M365

• Problem: `devTool/install` action fails with `DotnetInstallationError: Unable to check and install .NET Core SDK` even when .NET is already installed in CI
• Fix: Remove the `devTool/install` action and use system `dotnet` directly (CI environment already has .NET installed via `actions/setup-dotnet`)

Testing

Verified all three samples build successfully after the changes:

# intelligent-data-chart-generator/api
npm install && npm run build  # ✅ Success

# hello-world-tab-with-backend/api  
npm install && npm run build  # ✅ Success

# hello-world-tab-with-backend (root - React app)
npm install && npm run build  # ✅ Success

Related Issues

These fixes address E2E test failures in:

• ProvisionIntelligentDataChart.tests.ts
• ProvisionHelloWorldTabBackEnd.tests.ts
• ProvisionTodoListM365.tests.ts