Prevent showing `cmd` on Windows and using `pythonw.exe` (`pythonw.exe -m ruff`)

[dalthviz]

As part of adding support for ruff on Spyder, I stumbled with a couple of issues on Windows (spyder-ide/spyder#24970). Seems like on Windows a cmd is shown everytime a run_ruff call is done. Checking, seems like doing the following changes prevent any cmd appereance on Windows:

• Pass the CREATE_NO_WINDOW flag in the Popen call. So changing:

python-lsp-ruff/pylsp_ruff/plugin.py

Line 560 in a0a33a6

p = Popen(cmd, stdin=PIPE, stdout=PIPE)

To be something like (including adding the new import for CREATE_NO_WINDOW)

    p = Popen(cmd, stdin=PIPE, stdout=PIPE, creationflags=CREATE_NO_WINDOW) 

• Ensure python.exe usage (instead of for example pythonw.exe) when running ruff as a module. So changing:

python-lsp-ruff/pylsp_ruff/plugin.py

Line 505 in a0a33a6

cmd = [sys.executable, "-m", "ruff"]

To be

    cmd = [sys.executable.replace("pythonw", "python"), "-m", "ruff"]

Let me know if the above makes sense and I will submit a PR with the changes

[ccordoba12]

Changes look good to me @dalthviz. Please open a PR so @jhossbach and I can comment on them.