cli: get bison to parse commands on "and" and ";"

[majorsylvie]

currently, the only feature of current chiventure parsing that was unimplemented in bison was the ability to parse commands on semicolon and "and"

getting bison to parse commands generally on semicolons and "and" should not be difficult, and likely requires one level of definition above the current topmost seen in the bison-demo .y file.