Upgrade TypeScript to 5.9.2, @types/node to 22.17.0, and webpack to 5.101.1

[Copilot]

This PR upgrades key development dependencies to their latest compatible versions to improve type safety, leverage newer language features, and benefit from bug fixes and performance improvements.

Changes Made

Dependency Upgrades

• TypeScript: 5.1.3 → 5.9.2 - Latest stable version with improved type checking and performance
• @types/node: 16.18.36 → 22.17.0 - Updated Node.js type definitions for better compatibility
• webpack: 5.77.0 → 5.101.1 - Latest version with security fixes and performance improvements

Additional Type Compatibility Fixes

• @types/gulp: 4.0.6 → 4.0.17 - Updated for better TypeScript 5.9 compatibility
• @types/vinyl: Added explicit 2.0.12 - Resolved transitive dependency type conflicts
• chokidar: Added explicit 4.0.3 - Fixed FSWatcher interface compatibility issues

Code Fixes Required by Upgrades

Fixed TypeScript 5.9 stricter null checking:

// Before: TypeScript 5.9 detected unreachable nullish coalescing
context.telemetry.properties.detectedFrameworks = `(${detectorResult?.frameworks.map(fi => fi.framework).join('), (')})` ?? 'N/A';

// After: Proper conditional check
context.telemetry.properties.detectedFrameworks = detectorResult?.frameworks ? `(${detectorResult.frameworks.map(fi => fi.framework).join('), (')})` : 'N/A';

Fixed regex compatibility for ES6 target:

// Before: Used ES2018+ 's' flag that wasn't available in ES6 target
data.replace(/<!-- region exclude-from-marketplace -->.*?<!-- endregion exclude-from-marketplace -->/gis, '');

// After: Compatible approach using character class
data.replace(/<!-- region exclude-from-marketplace -->[\s\S]*?<!-- endregion exclude-from-marketplace -->/gi, '');

Validation

✅ Build: TypeScript compilation succeeds without errors
✅ Lint: ESLint passes (minor warning about TypeScript version in plugin, but functionality works)
✅ Webpack: Production build completes successfully
✅ Main.js: Remains clean with no build artifacts
✅ Type Safety: All type issues resolved without using skipLibCheck

The project now benefits from the latest TypeScript features, improved type checking, and updated security patches while maintaining full backward compatibility.

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