[Prepreq] Revisit the algorithm in transformer.lisp

[hikettei]

• Complete Implementing Scheduler
• Revisit Loop Fusion at ./transform.lisp
• Loop Fusion regardless of x.users == 1, (to valid fusion for Transformer)
• Polyhedral Group for valid Tiling, Unrolling, Vectorizing
  https://arxiv.org/pdf/2006.12645
  https://speakerdeck.com/ideininc/pldi-21lun-wen-du-mihui-akg-automatic-kernel-generation-for-neural-processing-units-using-polyhedral-transformations?slide=18
• Tests for Matmul+Transpose Fusion
• Fix for unrolling (support transposed FUNCALL)
  • Fix for RMSNorm (transform.lisp)
• After merging [Prepreq] Revisit the algorithm in transformer.lisp #138, start working on implementing tiling and the benchmark.