feat: allow scaling the floating window width and height separately

Now you can have e.g. a wide screen yazi.nvim experience by setting
`floating_window_scaling_factor = { width = 0.95, height = 0.70 }` in
your configuration 😄

lua/yazi/types.lua

@@ -2,6 +2,8 @@
 
 ---@module "plenary.path"
 
+---@alias YaziFloatingWindowScaling { height: number, width: number }
+
 ---@class (exact) YaziConfig
 ---@field public open_for_directories? boolean
 ---@field public chosen_file_path? string "the path to a temporary file that will be created by yazi to store the chosen file path"
@@ -13,7 +15,7 @@
 ---@field public hooks? YaziConfigHooks
 ---@field public highlight_groups? YaziConfigHighlightGroups
 ---@field public integrations? YaziConfigIntegrations
----@field public floating_window_scaling_factor? number "the scaling factor for the floating window. 1 means 100%, 0.9 means 90%, etc."
+---@field public floating_window_scaling_factor? number | YaziFloatingWindowScaling "the scaling factor for the floating window. 1 means 100%, 0.9 means 90%, etc."
 ---@field public yazi_floating_window_winblend? number "the transparency of the yazi floating window (0-100). See :h winblend"
 ---@field public yazi_floating_window_border? any "the type of border to use. See nvim_open_win() for the values your neovim version supports"
 ---@field public log_level? yazi.LogLevel

lua/yazi/window.lua

@@ -58,8 +58,20 @@ local function get_window_dimensions(config)
     return value > 1 and math.min(value, max) or math.floor(max * value)
   end
 
-  local height = size(vim.o.lines, config.floating_window_scaling_factor)
-  local width = size(vim.o.columns, config.floating_window_scaling_factor)
+  local height
+  local width
+
+  if type(config.floating_window_scaling_factor) == "number" then
+    height = size(vim.o.lines, config.floating_window_scaling_factor)
+    width = size(vim.o.columns, config.floating_window_scaling_factor)
+  else
+    assert(
+      type(config.floating_window_scaling_factor) == "table",
+      "floating_window_scaling_factor must be a number or a table"
+    )
+    height = size(vim.o.lines, config.floating_window_scaling_factor.height)
+    width = size(vim.o.columns, config.floating_window_scaling_factor.width)
+  end
 
   local row = math.floor((vim.o.lines - height) / 2)
   local col = math.floor((vim.o.columns - width) / 2)