fix formatting issue and last code snippet of lab 7

[yhwang]

fix some indentations, update mkdocs deps,
and make the last code snippet be able to be pasted to
python interpreter directly.

[jbusche]

LGTM! Thanks for fixing the formatting issues. What do you think @jjasghar? Do you like the uv option in Lab7?

[yhwang]

tried to provide uv as the alternative option in the change, which aligns with the mellea doc that I see here. it shouldn't change anything if user sticks with the venv + python.

[jjasghar]

I totally understand why you chose this, but it prefer not to reference uv at all.

There already is a lot to get here, and remember we have know way of knowing if our audience knows what a virtual environment is, we do this stuff everyday but our audience doesn't so more abstractions only cause possible confusion.

[yhwang]

@jjasghar understood. updated the content to only fix the indentation issues and made the last code snippet be able to be pasted to the python interpreter directly.

[jbusche]

Thank you @yhwang

[jbusche]

LGTM