feat: add ability to tag techniques

[Scott-James-Hurley]

closes UserOfficeProject/issue-tracker#1555

Description

This PR allows adding techniques to a tag. Functionality to use tags with techniques will follow.

Motivation and Context

Being able to associate techniques with tags will allow us to more efficiently generalise the Xpress functionality, a requirement for more facilities to be able to use it.

How Has This Been Tested

Adds an e2e test to cover adding and removing techniques from a tag.

Changes

• Adds a table tag_technique to associate techniques with tags
• Adds fetching and manipulating technique tags to technique data source and relevant resolvers and mutations
• Adds button for adding techniques to tags and table for viewing all added techniques in the tags page

Tests included/Docs Updated?

• I have added tests to cover my changes.

[bolmsten]

@Scott-James-Hurley how do we want this to work with the dynamic roles? At the moment the proposal reader role can have tags and that determines what read access the user has. Do you want to add here so that it also respects the technique associated with the tag?

[jekabs-karklins]

Hi @Scott-James-Hurley I was looking at this PR and was wondering, how is this intended to be used? Maybe we should jump on a quick call where you could help me understand how taggiing tehcniques allows us to more efficiently generalise the Xpress functionality? Thanks.