Make Breeze installation and reinstallation support both uv and pipx

[potiuk]

So far breeze fully supported only pipx installation. For example it would reinstall itself automatically with pipx if you attempted to run it from another workspace/checked out repository of Airflow, and it only provided instructions for pipx.

With this PR:

• the uv tool is preferred way to install breeze
• the pipx is PSF-governance managed alternative
• breeze will reinstall itself using uv if it has been installed with uv before when it is run from a different workspace or different airflow repo checked out in another folder

Also documentation is updated to make uv the recommended tool and describing how to install it - with pipx provided as an alternative.

Warning is printed in case pre-commit-uv is not installed with the
pre-commit (pre-commit-uv significantly speeds up installation of
the venvs by pre-commit). This warning also provides instructions
how to install it.

---

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[potiuk]

We'll have to cherry-pick that one to v2-10-test to enable automated breeze switching between checked out main and v2-10-test to the right version (when breeze is installed via uv tool)

[potiuk]

I also tested a few scenarios where we were switching between "breeze static checks" and "git commit" pre-commit as I noticed that they could be using different pre-commit installation, and they could make no use of the "pre-commit-uv" - I fixed it in this PR, and now also users will get warning if their pre-commit is installed without uv and they also will get instructions how to install it.

[amoghrajesh]

Few nits, otherwise LGTM +1