Implement Simple Visualizer

[masa10-f]

Before submitting, please check the following:

• Make sure you have tests for the new code and that test passes (run pytest)
• If applicable, add a line to the [unreleased] part of CHANGELOG.md, following keep-a-changelog.
• Format added code by ruff
• Type checking by mypy and pyright
• Make sure the checks (github actions) pass.
• Check that the docs compile without errors (run make html in ./docs/ - you may need to install dependency for sphinx docs, see docs/requirements.txt.)

Then, please fill in below:

Description of the change:

I have implemented a simple visualizer module, which shows BaseGraphState instance with coloring.
I have also added a visualization demo in examples/draw_graph.py
Within this PR, I moved is_clifford_angle and is_close_angle from euler to common

Related issue: