feat(#1079): add renderer.highlight_clipboard default name, defaults to undercurls (#2410)

* feat(#1079): add highlight NvimTreeCopiedText and NvimTreeCutText

* feat(#1079): add highlight NvimTreeCopiedText and NvimTreeCutText

* feat(#1079): node may not be present in copy and cut

* feat(#1079): add renderer.highlight_clipboard

* feat(#1079): renderer.highlight_clipboard takes options, style cut/copy HL

* feat(#1079): renderer.highlight_clipboard takes options, style cut/copy HL

* feat(#1079): use an enum for highlight position

* feat(#1079): diagnostics uses _append_highlight

doc/nvim-tree-lua.txt

@@ -388,6 +388,7 @@ Following is the default configuration. See |nvim-tree-opts| for details.
         highlight_diagnostics = false,
         highlight_opened_files = "none",
         highlight_modified = "none",
+        highlight_clipboard = "name",
         indent_markers = {
           enable = false,
           inline_arrows = true,
@@ -843,6 +844,12 @@ Value can be `"none"`, `"icon"`, `"name"` or `"all"`
 This can be used with or without the icons.
   Type: `string`, Default `"none"`
 
+*nvim-tree.renderer.highlight_clipboard*
+Enable highlight for clipboard items using the `NvimTreeCutHL` and
+`NvimTreeCopiedHL` groups.
+Value can be `"none"`, `"icon"`, `"name"` or `"all"`.
+  Type: `string`, Default: `"name"`
+
 *nvim-tree.renderer.indent_markers*
 Configuration options for tree indent markers.
 
@@ -2171,6 +2178,10 @@ Standard: >
     NvimTreeStatusLine          StatusLine
     NvimTreeStatusLineNC        StatusLineNC
 <
+Clipboard: >
+    NvimTreeCopiedHL            SpellRare
+    NvimTreeCutHL               SpellBad
+<
 Picker: >
     NvimTreeWindowPicker
 <