fix: error opening file when window.width is not lua number

Author: williamhCode

lua/neo-tree/utils.lua

@@ -496,6 +496,21 @@ M.open_file = function(state, path, open_cmd)
       if is_neo_tree_window then
         -- Neo-tree must be the only window, restore it's status as a sidebar
         local width = M.get_value(state, "window.width", 40, false)
+        local available_width = vim.api.nvim_win_get_width(0)
+        if type(width) == "string" then
+          if width:match("^%d+$") then
+            width = tonumber(width)
+          elseif width:match("^%d+%%$") then
+            local percent = tonumber(width:sub(1, -2)) / 100
+            width = math.floor(available_width * percent)
+          else
+            error("Invalid width: " .. width)
+          end
+        elseif type(width) == "function" then
+          width = math.floor(width())
+        elseif type(width) ~= "number" then
+          error("Invalid width type: " .. type(width))
+        end
         local nt = require("neo-tree")
         local split_command = "vsplit "
         -- respect window position in user config when Neo-tree is the only window