patch 9.0.1766: Runtime: Missing QML support

Problem:  Runtime: Missing QML support
Solution: Add QML support to Vim

closes: #12810

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: ChaseKnowlden <haroldknowlden@gmail.com>

runtime/indent/qml.vim

@@ -0,0 +1,59 @@
+" Vim indent file
+" Language:     QML
+" Maintainer:   Chase Knowlden <haroldknowlden@gmail.com>
+" Last Change:  2023 Aug 16
+"
+" Improved JavaScript indent script.
+
+" Indent script in place for this already?
+if exists("b:did_indent")
+  finish
+endif
+let b:did_indent = 1
+let b:undo_indent = "setlocal indentexpr< indentkeys<"
+
+setlocal indentexpr=s:GetQmlIndent()
+setlocal indentkeys=0{,0},0),0],:,!^F,o,O,e,*<Return>,=*/
+
+" Only define functions once per session
+if exists("*s:GetQmlIndent")
+  finish
+endif
+
+" Clean up a line of code by removing trailing '//' and '/* */' comments, and trimming
+" whitespace
+function! s:Trim(line)
+  return substitute(substitute(substitute(a:line, '// .*', '', ''), '/\* .* \*/', '', ''), '^\s*\|\s*$', '', 'g')
+endfunction
+
+function! s:GetQmlIndent()
+  let num = v:lnum
+  let line = s:Trim(getline(num))
+
+  let pnum = prevnonblank(num - 1)
+  if pnum == 0
+    return 0
+  endif
+  let pline = s:Trim(getline(pnum))
+
+  let ind = indent(pnum)
+
+  " bracket/brace/paren blocks
+  if pline =~ '[{[(]$'
+    let ind += &sw
+  endif
+  if line =~ '^[}\])]'
+    let ind -= &sw
+  endif
+
+  " '/*' comments
+  if pline =~ '^/\*.*\*/'
+    " no indent for single-line form
+  elseif pline =~ '^/\*'
+    let ind += 1
+  elseif pline =~ '^\*/'
+    let ind -= 1
+  endif
+
+  return ind
+endfunction