refactor(cli): move repl engine to reply module #306

Job	Run time
Standalone Package Export Check	1m 6s
Build (clang)	1m 1s
Runtime Smoke Checks	1m 26s
Build (gcc)	46s
Static Analysis	52s
Valgrind Checks	48s
Configuration Coverage	1m 3s
CLI Strict CI Summary	-1s
	7m 1s

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