@W-19978113 Build Core Runtime Error Capture and Diagnostic Payload / Implement Error Handling System

[deepu-mungamuri94]

@W-19978113@

What does this PR do?

This adds a robust error capture and reporting system for LWC local development that captures runtime errors from the browser and displays them formatted in the terminal.

Features:

• ErrorStore: In-memory store for runtime errors with deduplication
• Error Capture HTTP Server: Standalone server on LWC port + 1
• Error Middleware: Express middleware for capturing/querying errors
• Error Formatter: CLI-friendly formatted error output with colors
• Stack Trace Utils: Parse and sanitize stack traces

Components:

• src/lwc-dev-server/errorStore.ts: Error storage with statistics
• src/lwc-dev-server/errorHttpServer.ts: HTTP server for error endpoints
• src/lwc-dev-server/errorMiddleware.ts: Express middleware
• src/shared/errorFormatter.ts: Format errors for terminal display
• src/shared/stackTraceUtils.ts: Stack trace parsing utilities
• src/types/errorPayload.ts: TypeScript types for error diagnostics

Testing:

• Comprehensive unit tests for all error capture components
• E2E tests for error capture workflow
• Test fixtures for validation

Updated:

• package.json: Added express dependency
• src/lwc-dev-server/index.ts: Integrated error capture server
• yarn.lock: Updated dependencies

Error Capture Endpoints:

• POST /_dev/errors - Capture error reports
• GET /_dev/errors - Query errors with filters
• DELETE /_dev/errors - Clear all errors
• GET /_dev/errors/stats - Get error statistics
• GET /_dev/health - Health check

Auto-clears errors on server restart. Can also manually clear via DELETE endpoint.

What issues does this PR fix or reference?

[salesforce-cla]

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