feat: add chemical query (MIN-59)

Objective:

Add connect search chemicals query.

What has been done:

• Added chemicals reducers, thunks, slice, and types files in the redux folder
• Added tests for reducers and thinks
• Added fixtures

requested review from @AdrianOrlow and @teoMiesiac

assigned to @mateuszmiko

changed title from Resolve MIN-59 "Feature/ connect search chemical query" to feat: add chemical query (MIN-59)

deleted the feature/MIN-61-connect-content-query branch. This merge request now targets the development branch

added 3 commits

• ffb0d28a...c250dcaa - 2 commits from branch development
• cc7984c6 - fix: fix conflcits with development

Compare with previous version

LGTM expect chemicalSchema -> it's rfc for me

added 1 commit

• 3bc158a0 - feat(chemicals): add data type for directEvidenceReferences

Compare with previous version

approved this merge request

added 1 commit

• 2aeb087e - feat(chemicals): set directEvidence on nullable

Compare with previous version

approved this merge request

resolved all threads

mentioned in commit 6f4401b0

merged