create page for viewing a deck

[janethuangg]

[3] #25 related to user story #19

• add card CTA should render conditionally (e.g. it should say something like "view my card" for registered users who already added a card
• there should also be some way to go back to the previous card
• share button should pull up that menu thing (not sure what android looks like lol) w/ a prewritten message
• just render the cards in an infinite scrolling view (lazy loaded OPTIONAL) w/ a dynamic number of cards / row (fill the row) – aka a grid
• share button should copy a link to the user's clipboard

[cindykimxp]

DECK VIEW A, DECK VIEW B

• web application: grid (flex row)
• mobile application: list (flex column)
• responsive (loading 5 vs 10 at a time)