Refactor: STEP 5 Clean up state tree for redux

[duong-se]

Background context or User story:

• Reducer folder is messy
  
• Redux state tree is messy
  

Specification or Acceptance Criteria:

• Move reducer use for developer to developer folder, admin to admin folder and client to client folder
• Plat state of developer to developer node, auth to auth.ts node, admin to admin.ts node, and client to client.ts

{
  auth: {
    identity: {},
  },
  developer: {
    scopes: {},
    apps: [],
    error: '',
    isAppLoading: {}
    isDeveloperLoading: {}
  },
  admin: {
    apps: {}
  },
  client: {}
}

• Use action prefix for action types like
  DEVELOPER_FETCH_APPS
DEVELOPER_FETCH_APPS_SUCCESS
DEVELOPER_FETCH_APPS_FAILED

Suggested solution:

• Move reducer use for developer to developer.ts, admin to admin.ts and client to client.ts

[duong-se]

This ticket is no longer correct after we migrate to 3 portal. So who pick this ticket should discuss with the team before implement