Add tasks for all the new languages

Task/Concurrent-computing/FreeBASIC/concurrent-computing.freebasic

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+' FB 1.05.0 Win64
+' Compiled with -mt switch (to use threadsafe runtiume)
+' The 'ThreadCall' functionality in FB is based internally on LibFFi (see [https://github.com/libffi/libffi/blob/master/LICENSE] for license)
+
+Sub thread1()
+  Print "Enjoy"
+End Sub
+
+Sub thread2()
+  Print "Rosetta"
+End Sub
+
+Sub thread3()
+  Print "Code"
+End Sub
+
+Print "Press any key to print next batch of 3 strings or ESC to quit"
+Print
+
+Do
+  Dim t1 As Any Ptr = ThreadCall thread1
+  Dim t2 As Any Ptr = ThreadCall thread2
+  Dim t3 As Any Ptr = ThreadCall thread3
+  ThreadWait t1
+  ThreadWait t2
+  ThreadWait t3
+  Print
+  Sleep
+Loop While Inkey <> Chr(27)