Dev infrastructure

[fjarri]

Stacked on top of #68

• Added ExecutionResult and run_sync_with_tracing(), to remove some boilerplate from tests
• Renamed testing module and feature to dev to avoid confusion with test

[coveralls]

Pull Request Test Coverage Report for Build 11903713816

Details

• 31 of 72 (43.06%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.8%) to 68.6%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
manul/src/dev/run_sync.rs	31	35	88.57%
manul/src/session/transcript.rs	0	37	0.0%
<!--	Total:	31	72	43.06%	-->

Totals
Change from base Build 11903674817:	-0.8%
Covered Lines:	1798
Relevant Lines:	2621

---

💛 - Coveralls