cli: additional flags and cleanup

cli: additional flags and cleanup

	* add -q flag to suppress error messages
	* add -t flag to test type of result
	* clean up exit codes to indicate success;
		- 0 if all -t and -e expression yielded a result
		- 1 if at least one -t or -e expression didn't match
		- 125 when failed to open input file
		- 126 when failed to parse json input
		- 127 when the farser fails due to oom