feat: set default config for pylsp.

[ayamir]

I set the default config for pylsp and solved the problem in #767 by enable ruff to do lint.

Main config:

1. Use python-lsp-ruff to provide lint function due to its high performance.
2. Use pylsp-rope to provide code refactor function in code action's way as mentioned in Should we change default python lsp from `pyright` to `pylsp`? #708 (reply in thread).
3. Use python-lsp-black to provide format function.
4. Remove black config in null-ls.
5. Users no need to install or update these plugins manually after pylsp installed or updated.

The result:

[ayamir]

@fecet @CharlesChiuGit

[fecet]

I just started learning about Python's linter and formatter today, so I may not be able to provide any assistance beyond testing.
What could be the reasons for neodim not supporting it? Ruff support both format and lint. How about using ruff provided by ruff-lsp or null-ls? I've seen https://github.com/CharlesChiuGit/nvimdots.lua/blob/df6576052e3d72f8a76e59457c0101203c634d42/lua/core/settings.lua#L109
configure it that way, if I understand correctly.

Edit: I just realized ruff format in null-ls is simply call ruff with --fix option, so we still need black.

[ayamir]

I tend to use ruff as plugin of pylsp because the dependency is linear.

[fecet]

I have tried this PR and everything works fine! Except I notice two things:

• python-lsp-ruff lint seems too strict, sources like "import but unused" or "line too long" would be considered as "Error".
• ruff's code action "Ruff organize import" will randomly move character:
  
  (note position of first "i" and "l" in the last line)
  Of course all of them are upstream issues.

[ayamir]

1. I added F401 and E501 to ignore.
2. Disable isort because ruff can do the same thing.

[fecet]

I think it's better not to include any ignore as default, if anyone found this was annoyed, they could add that in ther pyproject.toml or set diagnostics_virtual_text as false (I did this). As there is hope for this issue to be resolved quickly per python-lsp/python-lsp-ruff#36

[ayamir]

OK，we can wait for this.

[charliie-dev]

Agree with @fecet , we can just comment out the ignore table.