UI - Updates to SI Form for Jointly or In Concert

Legal has identified there should be three ways to act with another Significant Individual. These are jointly, in concert and with an associate. A number of changes are needed to support having three types.

- all wording has changed, update as per design
- note, there is a third option (jointly, in concert and with associate)
- hyperlinks go to Business Corporations Act as per below

BCA Links (from BA ticket #25317)
**119.11(3)** -
https://www.bclaws.gov.bc.ca/civix/document/id/complete/statreg/02057_055#:~:text=(3),respect%20of%20the%20company.
**119.11(4)(a)** - https://www.bclaws.gov.bc.ca/civix/document/id/complete/statreg/02057_055#:~:text=the%20company%20if-,(a),to%20be%20exercised%20jointly%20or%20in%20concert%20by%20those%20individuals%2C%20or,-(b)
**119.11(4)(b)** - https://www.bclaws.gov.bc.ca/civix/document/id/complete/statreg/02057_055#:~:text=those%20individuals%2C%20or-,(b),definition%20of%20%22associate%22%20in%20section%20192%20(1)%2C%20of%20the%20other%20individuals.,-Transparency%20register

Design: https://www.figma.com/design/4oi1IWHe0DmbY8EZk3Srs3/Add%2Fedit-SI?node-id=270-18539&t=7yqIPmQh4sUZhqbf-1
jointly/in concert states: https://www.figma.com/design/4oi1IWHe0DmbY8EZk3Srs3/Add%2Fedit-SI?node-id=3137-29880&t=7yqIPmQh4sUZhqbf-1

Start with the Significant Individual form represented by the linked Figma screens and compare its current wording, options, and Business Corporations Act hyperlinks with the issue. Trace the frontend entry point for adding or editing a Significant Individual, then verify the three choices and links match the design and legal URLs; done when the form supports jointly, in concert, and with an associate.

Written by the indexing model from the issue text.