Migrate critical components: CreateFlag.js

[Zaimwa9]

Critical component used in:

• FeatureRow
• ChangeRequestEetail
• FeaturesPage
• UserPage

State of the component:

• Class component
• 2193 lines
• No typing and no hooks
• Uses HOC Providers

Objectives

Ranked by priority

• Migrate it to a Functional component (along with TS)
• Break it in small / modular and dedicated components
• Remove the Providers injections to use RTK