Collect function initial draft

[anderson-joyle]

Collect function to enable cards usage

[coveralls]

Pull Request Test Coverage Report for Build 317432

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 4 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.02%) to 64.242%

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Files with Coverage Reduction	New Missed Lines	%
/src/libraries/Microsoft.PowerFx.Core/Public/Values/CollectionTableValue.cs	4	91.49%

Totals
Change from base Build 317422:	0.02%
Covered Lines:	24503
Relevant Lines:	38142

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💛 - Coveralls

[MikeStall]

Note to others - this is an early draft. We're discussing, and will confirm semantics with GregLi.

[BruceHaley]

✔️ No Binary Compatibility issues for Microsoft.PowerFx.Connectors.dll
✔️ No Binary Compatibility issues for Microsoft.PowerFx.Core.dll
✔️ No Binary Compatibility issues for Microsoft.PowerFx.Interpreter.dll
✔️ No Binary Compatibility issues for Microsoft.PowerFx.LanguageServerProtocol.dll
✔️ No Binary Compatibility issues for Microsoft.PowerFx.Transport.Attributes.dll