filetypes: set rules for python filetype

- Disables forlding.
- Lets Ruff sort imports and format file content on save.

Co-Authored-by: iGor milhit <igor@milhit.ch>

after/ftplugin/python.lua

@@ -0,0 +1,25 @@
+-- Deactivate fold for python files
+
+vim.opt.foldlevel = 99
+
+-- Ruff import sorting and formatting
+
+vim.api.nvim_create_autocmd("BufWritePre", {
+  buffer = 0,
+  callback = function()
+    -- Tri des imports via code action Ruff
+    local clients = vim.lsp.get_clients({ bufnr = 0 })
+    for _, c in ipairs(clients) do
+      if c.name == "ruff" then
+        vim.lsp.buf.code_action({
+          context = { only = { "source.organizeImports.ruff" } },
+          apply = true,
+        })
+        break
+      end
+    end
+    -- Formatage du code
+    vim.lsp.buf.format({ async = false })
+  end,
+})
+