feat(charka): charka-shadow — validador en sombra + corpus COBOL
1* corpus charka — nivel 4: PERFORM n TIMES y un párrafo aparte
2IDENTIFICATION DIVISION.
3PROGRAM-ID. BUCLE.
4DATA DIVISION.
5WORKING-STORAGE SECTION.
601 WS-CONT PIC 9(3) VALUE 0.
701 WS-TOTAL PIC 9(5) VALUE 0.
8PROCEDURE DIVISION.
9MAIN.
10 PERFORM SUMAR 5 TIMES.
11 DISPLAY 'TOTAL=' WS-TOTAL.
12 STOP RUN.
13SUMAR.
14 ADD 1 TO WS-CONT.
15 ADD WS-CONT TO WS-TOTAL.