feat: add option to set last active window as target for file actions

- Add new option `set_last_win_as_target` to `opts.actions`
- Update documentation to reflect new option
- Set default value of `set_last_win_as_target` to `true`

doc/nvim-tree-lua.txt

@@ -570,6 +570,7 @@ Following is the default configuration. See |nvim-tree-opts| for details. >lua
       },
       actions = {
         use_system_clipboard = true,
+        set_last_win_as_target = true,
         change_dir = {
           enable = true,
           global = false,
@@ -1434,6 +1435,14 @@ function are invoked. When enabled, copied text will be stored in registers
 '+' (system), otherwise, it will be stored in '1' and '"'.
   Type: `boolean`, Default: `true`
 
+*nvim-tree.actions.set_last_win_as_target*
+A boolean value that toggles the behavior of setting the last active window as
+the target window for `nvim-tree`. When enabled, the last active window will be
+set as the target for file actions (like opening files), ensuring better window
+management. When disabled, the default behavior applies.
+
+  Type: `boolean`, Default: `true`
+
 *nvim-tree.actions.change_dir*
 vim |current-directory| behaviour.
 
@@ -2887,6 +2896,7 @@ highlight group is not, hard linking as follows: >
 |nvim-tree.actions.open_file.window_picker.picker|
 |nvim-tree.actions.remove_file.close_window|
 |nvim-tree.actions.use_system_clipboard|
+|nvim-tree.actions.set_last_win_as_target|
 |nvim-tree.auto_reload_on_write|
 |nvim-tree.diagnostics.debounce_delay|
 |nvim-tree.diagnostics.enable|

lua/nvim-tree.lua

@@ -232,6 +232,17 @@ local function setup_autocommands(opts)
       end,
     })
   end
+
+  if opts.actions.set_last_win_as_target then
+    create_nvim_tree_autocmd("BufLeave", {
+      callback = function()
+        local buf_name = vim.api.nvim_buf_get_name(0)
+        if not string.find(buf_name, "NvimTree_") then
+          require("nvim-tree.lib").set_target_win()
+        end
+      end,
+    })
+  end
 end
 
 local DEFAULT_OPTS = { -- BEGIN_DEFAULT_OPTS
@@ -429,6 +440,7 @@ local DEFAULT_OPTS = { -- BEGIN_DEFAULT_OPTS
   },
   actions = {
     use_system_clipboard = true,
+    set_last_win_as_target = true,
     change_dir = {
       enable = true,
       global = false,
@@ -490,8 +502,7 @@ local DEFAULT_OPTS = { -- BEGIN_DEFAULT_OPTS
       default_yes = false,
     },
   },
-  experimental = {
-  },
+  experimental = {},
   log = {
     enable = false,
     truncate = false,