refactor: implement suggested improvements to codebase

[panz3r]

This PR updates the code review documentation and several source files to reflect the resolution of all critical and medium priority issues in the React Native Toolbox codebase.
The documentation now tracks the status of each issue, clarifies which improvements have been completed, and introduces a summary table. Source files have been updated to improve type safety, error handling, documentation, and code clarity. Most actionable low-priority issues are also resolved, with remaining items noted as optional enhancements or style preferences for future consideration.

Resolved Critical and Medium Issues:

• License Header Added: The missing MPL-2.0 license header was added to src/types.ts, bringing it in line with other source files.
• Error Handling Improved: Error handling in src/cli/runner.ts was refactored to ensure consistent exit codes and proper re-throwing of unexpected errors.
• Type Safety: Unsafe type assertions in command files (icons.ts, splash.ts) were replaced with type guards for safer runtime checks.
• Partial Failure Exit Codes: Commands now exit with an error code if any assets fail to generate, improving reliability and clarity for users.

Documentation and Code Quality Improvements:

• ESLint Rule and Comments: Outdated ESLint configuration and comments referencing Chai were removed or updated to reflect the current Node.js test framework.
• Race Condition Documentation: Comments were added to clarify the safety of concurrent directory creation in icon generation.
• JSDoc Comments: Public utility methods now have JSDoc documentation for better API clarity.
• CLI Binary Name: The CLI binary name is now imported from a shared constant instead of being hardcoded.

Status Tracking and New Findings:

• Status Table Added: The documentation includes a summary table of all tracked issues and their resolution status.
• Semicolon Consistency: A new finding highlights inconsistent semicolon usage in interface definitions, suggesting future style improvements.

Remaining Items (Optional/Enhancement):

• Code duplication in splashscreen generation, defensive boolean coercion, file size validation, dry-run flag, and semicolon consistency are noted as optional or cosmetic improvements for future iterations.

[Copilot]

Pull request overview

This PR resolves all critical and medium priority issues identified in the codebase code review, along with most actionable low priority items. The changes improve type safety, error handling, documentation, and code consistency across the React Native Toolbox project.

Changes:

• Fixed type assertions with proper type guards for safer runtime checks
• Corrected exit codes to reflect partial generation failures
• Added MPL-2.0 license header and JSDoc documentation to public APIs
• Removed outdated ESLint configuration and comments
• Extracted CLI binary name to a shared constant

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
test/e2e/cli.test.ts	Updated test assertion to expect GENERATION_ERROR exit code on partial failures
src/utils/file-utils.ts	Added JSDoc documentation for public utility functions
src/utils/app.utils.ts	Added JSDoc documentation with usage example
src/types.ts	Added missing MPL-2.0 license header
src/constants.ts	Introduced CLI_BIN constant for shared binary name
src/commands/splash.ts	Replaced type assertion with type guard and added error exit on partial failures
src/commands/icons.ts	Replaced type assertion with type guard, added error exit on partial failures, and documented concurrent mkdir safety
src/cli/help.ts	Updated to import CLI_BIN constant instead of hardcoding
eslint.config.mjs	Removed outdated ESLint rule referencing Chai
docs/005-CODE-REVIEW-IMPROVEMENTS.md	Updated status tracking with resolution details and new findings