[Emulator] Support scripting for gates testing

[DmitrySoshnikov]

The --exec-on-data already allows accepting testing data, and validating the outputs. In addition we can provide an ability to do scripted testing of the pins, and manually call some events (like tick, tock, etc) in the scripts. This can be compatible with the nand2tetris script testing.

TODO:

• [x] ~Script parser~ (https://github.com/DmitrySoshnikov/hdl-js/commit/858e6f451d80c0f4ade96e51f8ade3faca2b5f98)
• [x] ~Interpreter~ (https://github.com/DmitrySoshnikov/hdl-js/commit/6b86a4541131966936e7f50de86808d3aa9f8896)
• [x] ~CLI support~ (https://github.com/DmitrySoshnikov/hdl-js/commit/c4d174e490c01b549c60670d0b7c016c12d61f65)

Example testing And:

load And.hdl,
output-file And.out,
compare-to And.cmp,
output-list a%B3.1.3 b%B3.1.3 out%B3.1.3;

set a 0,
set b 0,
eval,
output;

set a 0,
set b 1,
eval,
output;

set a 1,
set b 0,
eval,
output;

set a 1,
set b 1,
eval,
output;

Output:

|   a   |   b   |  out  |
|   0   |   0   |   0   |
|   0   |   1   |   0   |
|   1   |   0   |   0   |
|   1   |   1   |   1   |

[DmitrySoshnikov]

Script parser support is added in https://github.com/DmitrySoshnikov/hdl-js/commit/858e6f451d80c0f4ade96e51f8ade3faca2b5f98.

[DmitrySoshnikov]

Base script interpreter is added in https://github.com/DmitrySoshnikov/hdl-js/commit/6b86a4541131966936e7f50de86808d3aa9f8896.

[DmitrySoshnikov]

CLI support is added in https://github.com/DmitrySoshnikov/hdl-js/commit/c4d174e490c01b549c60670d0b7c016c12d61f65.