Update runtime files

runtime/ftplugin/gdscript.vim

@@ -0,0 +1,53 @@
+vim9script
+
+# Vim filetype plugin file
+# Language: gdscript (Godot game engine scripting language)
+# Maintainer: Maxim Kim <habamax@gmail.com>
+
+if exists("b:did_ftplugin") | finish | endif
+
+b:did_ftplugin = 1
+b:undo_ftplugin = 'setlocal cinkeys<'
+      \ .. '| setlocal indentkeys<'
+      \ .. '| setlocal commentstring<'
+      \ .. '| setlocal suffixesadd<'
+      \ .. '| setlocal foldexpr<'
+      \ .. '| setlocal foldignore<'
+
+setlocal cinkeys-=0#
+setlocal indentkeys-=0#
+setlocal suffixesadd=.gd
+setlocal commentstring=#\ %s
+setlocal foldignore=
+setlocal foldexpr=GDScriptFoldLevel()
+
+
+def GDScriptFoldLevel(): string
+    var line = getline(v:lnum)
+    if line =~? '^\s*$'
+        return "-1"
+    endif
+
+    var sw = shiftwidth()
+    var indent = indent(v:lnum) / sw
+    var indent_next = indent(nextnonblank(v:lnum + 1)) / sw
+
+    if indent_next > indent && line =~ ':\s*$'
+        return $">{indent_next}"
+    else
+        return $"{indent}"
+    endif
+enddef
+
+
+# Next/Previous section
+def NextSection(back: bool, cnt: number)
+    for n in range(cnt)
+        search('^\s*func\s', back ? 'bW' : 'W')
+    endfor
+enddef
+
+nnoremap <silent><buffer>   ]] <scriptcmd>NextSection(false, v:count1)<CR>
+nnoremap <silent><buffer>   [[ <scriptcmd>NextSection(true, v:count1)<CR>
+xmap <silent><buffer><expr> ]] "\<esc>" .. v:count1 .. ']]m>gv'
+xmap <silent><buffer><expr> [[ "\<esc>" .. v:count1 .. '[[m>gv'