chore: St registry assignment#14

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RichoKD wants to merge 4 commits intoBlockheaderWeb3-Community:st-registry-assignmentfrom

RichoKD:st-registry-assignment

Commits on Aug 10, 2024

Cli state machine implementation for student registry
RichoKD
committed

Commits on Aug 15, 2024

Implemented courses
RichoKD
committed

Commits on Aug 17, 2024

add input util functions and did code cleanup
RichoKD
committed

Commits on Aug 18, 2024

added hashmaps to course and student structs
RichoKD
committed