Fixes theskumar#699

…r#700)

…ecation warning (theskumar#648)

…mar#711)

Fixes theskumar#710

…heskumar#686)

When writing a read-only .env fails on Windows, rewrite() no longer leaves a .tmp_* file behind, and the error raised is the one from the failed write rather than from the cleanup.

load_dotenv, dotenv_values, get_key, set_key, unset_key and the CLI --file option now expand a leading ~ to the user's home directory.

Fixes theskumar#525

find_dotenv and the IPython %dotenv magic now expand a leading ~ in the file name. Follows theskumar#615 (theskumar#525).

* Handle CRLF invalid lines in parser
* Test line numbers after CRLF parser recovery

---------

Co-authored-by: Bertrand Bonnefoy-Claudet <bertrand@bertrandbc.com>

Benefits:

- Replace unofficial `tox-gh-actions` plugin with its maintained successor `tox-gh`
- Switch to uv for slightly faster dependency installation and built-in caching

This is heavily inspired from what is done by tox-gh:
https://github.com/tox-dev/tox-gh/blob/6efb80fc24df3c6e08a3f99b55949d4fba3f248d/.github/workflows/check.yaml

Around 20% less CI usage when cached.

…#742)