Merge branch '44427-state-management-with-vuex' into 'master'

Resolve "Vuex actions - How to achieve a better state management"

Closes #44427

See merge request gitlab-org/gitlab-ce!17929

doc/development/fe_guide/index.md

@@ -45,6 +45,9 @@ Common JavaScript design patterns in GitLab's codebase.
 ## [Vue.js Best Practices](vue.md)
 Vue specific design patterns and practices.
 
+## [Vuex](vuex.md)
+Vuex specific design patterns and practices.
+
 ## [Axios](axios.md)
 Axios specific practices and gotchas.