sysutils/orch: update to 0.4

Highlights:

• Many bug fixes
• Improved ipc interface for more robust program startup
• Cleaner lib interface to allow use in lua scripts
• Multi-match support within a single match()
• Terminal resize support

While we're here, orch has been renamed to porch upstream to deconflict
with a pre-existing rust framework. The scripts are still called
(orch)estration scripts.

This change also switches to the new check-install target to sanity
test our install layout.