Re-serialize siglip2_text.tflite with inline buffers (iOS offset-buffer fix)

Re-serialize siglip2_vision.tflite with inline buffers (iOS offset-buffer fix)

Add SigLIP2 vision encoder TFLite (fp16, CPU-safe)

Add SigLIP2 vision encoder TFLite (fp16, CPU-safe)

Add SigLIP2 text encoder TFLite

initial commit