refactor(uncrustify): change rules to better align with the style guide

Add space around arithmetic operators '+' and '-'.
Remove space between back-to-back parentheses, i.e. ')(' vs. ') ('.
Remove space between '((' or '))' of control statements.
Add space between ')' and '{' of control statements.
Remove space between function name and '(' on function declaration.
Collapse empty blocks between '{' and '}'.
Remove newline at the end of the file.
Remove newline between 'enum' and '{'.
Remove newline between '}' and ')' in a function invocation.
Remove newline between '}' and 'while' of 'do' statement.

src/nvim/api/private/helpers.c

@@ -1245,7 +1245,7 @@ VirtText parse_virt_text(Array chunks, Error *err, int *width)
           if (ERROR_SET(err)) {
             goto free_exit;
           }
-          if (j < arr.size-1) {
+          if (j < arr.size - 1) {
             kv_push(virt_text, ((VirtTextChunk){ .text = NULL,
                                                  .hl_id = hl_id }));
           }