As a user, I should be able to see salary information for my job

Users should be able to view the salary information of the job they select in the dropdown.

The /transitions-extended/ endpoint returns a response like [this](https://github.com/codeforboston/jobhopper/blob/7886ee6490ae9c2defb31194d78ce0a6e8bb88fd/api/jobs/api.py#L198), which includes the salary information for the occupation in `source_soc.source_soc_*_mean_wage`. On the frontend, we process that response in [DjangoApiClient](https://github.com/codeforboston/jobhopper/blob/273d0fe2f6859c4cb01c6289e048ba18fd741fb2/frontend/src/services/api/DjangoApiClient.ts#L34). We need to update that to extract the salary info as well, and add the salary info to redux state.

Then, we want to show the source occupation as the first line of the table, but exclude transition share.