feat(#2225): add renderer.hidden_display to show a summary of hidden files below the tree (#2856)

* feat(icon_placement): Allow right_align icon_placemente for decorator using ext_marks nvim api

* feat(icon_placement): Allow right_align icon_placemente for decorator using ext_marks nvim api

feat(icon_placement): Allow right_align icon_placemente for decorator using ext_marks nvim api

* feat(icon_placement): consolidate doc

* fix: extra namespace added to avoid colision between right_align and full_name features

* feat(hidden_display): Allow fine grained rendering of hidden files in
a folder

* feat(hidden_display): update defaults in Builder to allow rendering

* feat(hidden_display): Rename opts function name for the feature

* feat(#2349): add "right_align" option for renderer.icons.*_placement (#2846)

* feat(icon_placement): Allow right_align icon_placemente for decorator using ext_marks nvim api

* feat(icon_placement): Allow right_align icon_placemente for decorator using ext_marks nvim api

feat(icon_placement): Allow right_align icon_placemente for decorator using ext_marks nvim api

* feat(icon_placement): consolidate doc

* fix: extra namespace added to avoid colision between right_align and full_name features

* style: rename namespace_id

---------

Co-authored-by: Alexander Courtis <alex@courtis.org>

* docs: update docs

* feat(hidden_display): Simplification and better performance by not sorting and grouping virtual lines

* Update doc/nvim-tree-lua.txt

Co-authored-by: Alexander Courtis <alex@courtis.org>

* style: hidden_stats is better

* docs: change to hidden_stats

* add separate namespace for virtual lines

* help: add highlight group

---------

Co-authored-by: Alexander Courtis <alex@courtis.org>

lua/nvim-tree/node.lua

@@ -21,6 +21,7 @@
 ---@field group_next Node|nil
 ---@field nodes Node[]
 ---@field open boolean
+---@field hidden_stats table -- Each field of this table is a key for source and value for count
 
 ---@class FileNode: BaseNode
 ---@field extension string