Fixes#696
- Replaced sharp dependency with wasm-vips (WebAssembly build of libvips)
- Eliminates native build requirements that caused installation failures
- Added vips.ts singleton wrapper for async initialization
- Updated image-resize.ts and image-convert.ts to use wasm-vips API
- Added unit tests for image processing functionality
- Switch from jiti to @mariozechner/jiti fork
- Use virtualModules option for bundled packages in compiled binary
- Disable tryNative so jiti handles all nested imports
- Lazy-load pi-coding-agent to avoid circular dependency