[ADD] Neura demo python script

[MeowMJ]

This is the open-source Python demo for Neura.

Run

./demo.sh

Python file structure:
tools/expandable/
├── README.md
├── main.py
├── core.py
└── visualization.py

Program logic:
Load and init task (Generate or read mapping result of kernels in ./tmp) -> Schedule kernels on multi-CGRAs (Generate schedule result in ./result) -> Visualize using generated result

TODO:

• Finish corner case.
• Finish visualization.py

[MeowMJ]

The script function is passed. I will format the code then.

[tancheng]

@MeowMJ ready to merge? I saw you also handle certain corner cases for unrolling factor, would that help to align the trends?

[MeowMJ]

Hi, here is the summary of the updated code:

Figure	Results
Fig. 9	All Neura cases now outperform Baseline, though Baseline remains inferior to Neura-L0, L1, and L2.
Fig. 10	Group 3 data aligns with the expected trend.
Fig. 11	No significant changes observed.

I'm working on the stacked bar output. Let's merge it after I update the visualizer.py.