Add Pagination Helper

[victorzheng02]

Description of proposed feature

We previously wanted to paginate suggestions feature #32, but we should create a general helper, which takes in a list of items, and a pageLimit, can output a paginated version of that list. The user should be able to react with emotes to shift left to right in the pages.

How can the new feature be used?

Alongside user suggestions, this can potentially be used on the codeycoin leaderboard, and the upcoming company info command #122 .

Additional comments

[mcpenguin]

Instead of using emotes, we can use buttons - see the RPS command for how we used buttons in an embed.