Add tasks for all the new languages

Task/Perfect-numbers/ERRE/perfect-numbers.erre

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+PROGRAM PERFECT
+
+PROCEDURE PERFECT(N%->OK%)
+      LOCAL I%,S%
+      S%=1
+      FOR I%=2 TO SQR(N%)-1 DO
+        IF N% MOD I%=0 THEN S%+=I%+N% DIV I%
+      END FOR
+      IF I%=SQR(N%) THEN S%+=I%
+      OK%=(N%=S%)
+END PROCEDURE
+
+BEGIN
+    PRINT(CHR$(12);) ! CLS
+    FOR N%=2 TO 10000 STEP 2 DO
+       PERFECT(N%->OK%)
+       IF OK% THEN PRINT(N%)
+    END FOR
+END PROGRAM