indents(c): add zero_indent for #if

lua/nvim-treesitter/indent.lua

@@ -35,6 +35,7 @@ local get_indents = tsutils.memoize_by_buf_tick(function(bufnr, root, lang)
     branch = {},
     ignore = {},
     aligned_indent = {},
+    zero_indent = {},
   }
 
   for name, node, metadata in queries.iter_captures(bufnr, "indents", root, lang) do
@@ -88,6 +89,10 @@ function M.get_indent(lnum)
   -- tracks to ensure multiple indent levels are not applied for same line
   local is_processed_by_row = {}
 
+  if q.zero_indent[node:id()] then
+    return 0
+  end
+
   while node do
     -- do 'autoindent' if not marked as @indent
     if not q.indent[node:id()] and q.auto[node:id()] and node:start() < lnum - 1 and lnum - 1 <= node:end_() then