Implement continuations in Source

[NhatMinh0208]

Description

This PR implements continuations for Source variants that use the CSE machine.

Changes

• [X] Define call_cc builtin function for the Explicit-Control variant
• [X] Add tests for continuations in Source
• [X] Update snapshots that concern the new builtin

[NhatMinh0208]

all looks like intended changes, let me just update the snapshots real quick

[coveralls]

Pull Request Test Coverage Report for Build 8402911055

Details

• 3 of 4 (75.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.001%) to 81.008%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/createContext.ts	3	4	75.0%
<!--	Total:	3	4	75.0%	-->

Totals
Change from base Build 8402690563:	0.001%
Covered Lines:	10505
Relevant Lines:	12565

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💛 - Coveralls