feat: use the new userselect component for pi

[jekabs-karklins]

Description

This PR introduces the new userselect component for the "Principal Investigator" field.

Motivation and Context

This change was necessary to keep the user experience consistant for both PI and Co-Proposer selector

Changes

2. Created new SQL script "Update_email_search_description.sql" to improve the description of the email search feature.
3. Renamed ProposalParticipant -> PrincipalInvestigator
4. Renamed Participants -> CoProposers
5. Renamed InviteUser -> ParticipantSelector
6. Updated "PrincipalInvestigator.tsx" to use the new ParticipantSelector component
7. Added two parameters to ParticipantSelector. 'multiple' and 'allowEmailInvites'

How Has This Been Tested?

Added e2e tests

Fixes Jira Issue

https://jira.esss.lu.se/browse/SWAP-4829

[simonfernandes]

Hi Jekabs, this looks great. We really liked your co-proposer modal and wanted to adopt it, and this is a great change that aligns both designs, so thank you for your work in developing both redesigns!

Just to give you an update on the co-proposer modal usage at STFC for context - we rolled it out to prod but have chosen not to show or use it yet (by keeping EMAIL_INVITE_LEGACY enabled). We are currently in our busiest call so we want to hold off on using it until it's quieter.

Is it possible to hide this PI modal behind a temporary flag too? We are thinking that a) we will need to do some testing/reviewing/tweaking on our side before it goes live and b) it might be nice for us to roll out both co-proposer and PI modal at the same time.

[jekabs-karklins]

Hi Jekabs, this looks great. We really liked your co-proposer modal and wanted to adopt it, and this is a great change that aligns both designs, so thank you for your work in developing both redesigns!

Just to give you an update on the co-proposer modal usage at STFC for context - we rolled it out to prod but have chosen not to show or use it yet (by keeping EMAIL_INVITE_LEGACY enabled). We are currently in our busiest call so we want to hold off on using it until it's quieter.

Is it possible to hide this PI modal behind a temporary flag too? We are thinking that a) we will need to do some testing/reviewing/tweaking on our side before it goes live and b) it might be nice for us to roll out both co-proposer and PI modal at the same time.

Hi @simonfernandes , i have adjusted do that both - co-proposers and pi are behind the feature toggle, now

[simonfernandes]

@jekabs-karklins Many thanks for that, I can confirm the feature works as expected for us.

[simonfernandes]

Looks good to me and your refactoring makes these components much easier to understand.

Only small thing I noticed is that when you open the PI modal and click in the text box, it shows a no results message. Same if you remove the current user and search a new user. This feels like a fairly insignificant and hard to notice thing though.