[Services] Add blob cli crates

Summary:
These crates are used to create an easy out-of-the-box cli experience.
Similar crate usage to backup service.

Initial diff for https://linear.app/comm/issue/ENG-2310

Test Plan:
A more thorough test will be added later in the stack

cd services/blob
cargo build

Reviewers: bartek, varun, max, ashoat

Reviewed By: bartek, ashoat

Subscribers: ashoat, tomek, atul

Differential Revision: https://phab.comm.dev/D6463