Refactor run-scripts
Refactor run-scripts

*   `test` command now additionally builds, lints, and tests
    mdast(1);
*   Add frail mode to `build-man`, to fail on warnings;
*   Add long flag names to mdast(1) man usage.

eush77/remark,chcokr/mdast,tanzania82/remarks,eush77/remark,chcokr/mdast,wooorm/remark