CSE Machine: Rename to CS1101S terms

[NhatMinh0208]

Description

This PR renames some elements in the CSE Machine to be consistent with actual terms used in CS1101S.

Changes

• [X] Rename EC Evaluator to CSE Machine
• [X] Rename Agenda to Control
• [X] Rename other mentions of ECE to CSE
• [X] Rename tests in ec-evaluator to cse-machine

[coveralls]

Pull Request Test Coverage Report for Build 7737349446

• -10 of 130 (92.31%) changed or added relevant lines in 7 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 83.041%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/index.ts	2	3	66.67%
src/runner/sourceRunner.ts	5	7	71.43%
src/cse-machine/interpreter.ts	100	107	93.46%
<!--	Total:	120	130	92.31%	-->

Totals
Change from base Build 7734754483:	0.0%
Covered Lines:	10910
Relevant Lines:	12713

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💛 - Coveralls

[NhatMinh0208]

@RichDom2185 I've resolved the conflicts and renamed the tests - feel free to have a look at it again!

[NhatMinh0208]

I will do a final pass on this later today, thanks!