Standardize on terminology for `Equal` function on structs

[sunnya97]

Throughout the SDK, there are a couple of different functions used for checking Equality called Equals and IsEqual. These should all be changed to Equal by Go convention.

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[ReCodee]

@tac0turtle This good first issue seems good for me to get started, Can I work on this issue?

[tac0turtle]

yes would love to thank you!! Let us know if you need any help

[EmilGeorgiev]

@tac0turtle @ReCodee I would like to work on this issue. Can I take it?