fix(cypher): resync on unsupported WITH/RETURN expression (#373)

split(f.path,'/')[0] and similar unknown function-call / index
expressions left their trailing tokens unconsumed, desyncing the parser into
a misleading default star projection (columns f.name/f.qualified_name/
f.label, one blank row per node). parse_return_item now consumes the balanced
parentheses/brackets of an unknown call so the parser stays in sync: the
requested RETURN/WITH column shape is preserved (aliases intact), sibling
aggregates like count(*) still compute, and the unsupported expression simply
projects empty instead of corrupting the whole projection. Existing scalar
forms (labels(), toInteger()) are unaffected.