refactor: Use UserLib identity and Caller [SDK-701]

[ghost]

Overview

The addition of pulling caller ID from the request and leaning on UserLib for identity management opens the door to simplifying much of our canister code. This PR attempts to streamline the profile API down to the actual business logic, removing much of the message construction and parsing mechanisms.

Also, to prepare for hiding addresses (which I don't feel should be user-facing) I made the search by first and last name.

Changes

• Add { caller } syntax for determining request caller IDs
• Remove message parsing from profile canister
• Remove message construction from front-end
• Use UserLib for identity management
• Remove identity generation (i.e. Registration Form) from front-end
• Refactor profile into submodules for directory and type declarations
• Refactor main.js to reduce duplication
• Add search by full name instead of address
• Move front-end into profile canister, remove index canister

[ghost]

Work in progress while I get tests passing.

[ghost]

Current hypothesis on the tests is that CI needs a newer version of dfx .

[ghost]

Ready for review since the master build is also failing.

[ghost]

Merging after getting verbal approval from Enzo this afternoon.

[ghost]

Oh wait. Not building with the latest dfx. Hold up.

[hansl]

Travis hasn’t worked ever as far as I know on this repo.

[ghost]

There was actually a change in Prim that I hadn't accounted for. All good now.