refacto: remove fs folder and move code to actions

- remove file moved to actions.remove-file.lua
- rename file moved to actions.rename-file.lua

lua/nvim-tree/actions/rename-file.lua

@@ -0,0 +1,38 @@
+local a = vim.api
+local uv = vim.loop
+
+local lib = require'nvim-tree.lib'
+local utils = require'nvim-tree.utils'
+local events = require'nvim-tree.events'
+
+local M = {}
+
+function M.fn(with_sub)
+  return function(node)
+    node = lib.get_last_group_node(node)
+    if node.name == '..' then return end
+
+    local namelen = node.name:len()
+    local abs_path = with_sub and node.absolute_path:sub(0, namelen * (-1) -1) or node.absolute_path
+    local new_name = vim.fn.input("Rename " ..node.name.. " to ", abs_path)
+    utils.clear_prompt()
+    if not new_name or #new_name == 0 then
+      return
+    end
+    if utils.file_exists(new_name) then
+      utils.warn("Cannot rename: file already exists")
+      return
+    end
+
+    local success = uv.fs_rename(node.absolute_path, new_name)
+    if not success then
+      return a.nvim_err_writeln('Could not rename '..node.absolute_path..' to '..new_name)
+    end
+    a.nvim_out_write(node.absolute_path..' ➜ '..new_name..'\n')
+    utils.rename_loaded_buffers(node.absolute_path, new_name)
+    events._dispatch_node_renamed(abs_path, new_name)
+    lib.refresh_tree()
+  end
+end
+
+return M