Image Processing System Refactored

What: Replaced optional native image processor module with pure Sharp-based implementation for more reliable and consistent image handling

Details:

• Previous versions attempted to use a compiled native module (image-processor.node) with Sharp as a fallback, often showing warnings like "Native image processor not available, falling back to sharp"
• New implementation uses Sharp exclusively with a sophisticated multi-stage compression strategy:

1. Multi-scale resizing (100%, 75%, 50%, 25% of original dimensions)
2. PNG-specific palette compression (64 colors at 800x800)
3. Progressive JPEG quality reduction (starting at quality 50 for 600x600)
4. Final fallback (400x400 at quality 20)

• Eliminates dependency on native compilation, improving reliability across different platforms
• More predictable behavior with deterministic compression strategies
• Evidence: Removed UqQ() at line 280470, $qQ at line 280527, qqQ() at line 280537 in v2.0.44; Added K5A() at line 156002, _P8() at line 156053, xP8() at line 156081, vP8() at line 156089, bP8() at line 156097 in v2.0.45