Add copilot setup workflow. #56

Job	Run time
Compile and Test CodeQL Packs (cpp)	55s
Compile and Test CodeQL Packs (common)	9m 25s
Compile and Test CodeQL Packs (csharp)	1m 28s
Compile and Test CodeQL Packs (javascript)	1m 2s
Compile and Test CodeQL Packs (go)	55s
Compile and Test CodeQL Packs (java)	1m 18s
Compile and Test CodeQL Packs (python)	1m 5s
Compile and Test CodeQL Packs (ruby)	1m 56s
Validate test results	5s
	18m 9s

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