Add share button for sharing simularium result link

[rugeli]

Use Case

Make the result easy for users to share from cellPACK Studio. Add a Share button that allows users to quickly share the current simularium link with others

Acceptance Criteria

• add a share button (location TBD with UX)
  -on click, open a small menu or modal with:
  - copy current result link
  - share via email, slack, teams, etc
• refer to Share button in Simularium

• need UX review