Initial data commit

Task/Hello-world-Text/VHDL/hello-world-text.vhdl

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+LIBRARY std;
+USE std.TEXTIO.all;
+
+entity test is
+end entity test;
+
+architecture beh of test is
+begin
+  process
+    variable line_out : line;
+  begin
+    write(line_out, string'("Hello world!"));
+    writeline(OUTPUT, line_out);
+    wait; -- needed to stop the execution
+  end process;
+end architecture beh;