Implement Jenkins executor #267

Job	Run time
Test StringEnum Trimmed	33s
Timestamp	8s
Build macOS Shim	1m 0s
Build Windows Shim	57s
Build and Test Libraries on Windows	9m 1s
Build Libraries on macOS	4m 47s
Build Linux Pass 1	7m 34s
Build macOS Pass 1	4m 39s
Build Windows Pass 1	7m 36s
Build Linux Shim	41s
Build macOS UEFS	1m 22s
Build Windows UEFS	3m 21s
Build Linux Pass 2	7m 55s
Build macOS Pass 2	5m 31s
Build Windows Pass 2	7m 59s
Publish UET Container	24s
Test Schema Generation	17s
Publish UET Container (with Wine)	49s
Publish to NuGet	0s
Publish UEFS Container	0s
Publish to GitHub	0s
	1h 4m 34s

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