UI: Significant Individual table on Company Information page (Add a SI)

### User Story
As a legal professional using the skeleton version, I want to be able to initiate the process of adding a significant individual (SI) from the Company Information page, so that I can understand the basic functionality of the skeleton version.

### Notes
The Company Information page is the starting point for the 'skeleton' version of the Add Significant Individuals functionality.
Looks like Directors table but will have a change button at the top right.
Initial state is empty.

### Instructions

Add a change link that opens the Significant Individual Change standalone page