feat(platform): Create session mgmt package

[betimshahini]

As we have a few reusable functions and structures in all of our apps that do or facilitate session management, we need to extract those into a package to be reused across the call sites.

This should sit in package/security

• [ ] Rename consoleParam session utils and consoleParam context property in Passport
• [ ] Extract user session utils
• [ ] Flash message consts
• [ ] Creation of internal app (console/passport) default authz requests