LKT-LIB-RS: Add comments about modules + small refacto of deamon code

src/rust/amadeus-rs/amadeus/src/utils/deamon.rs

src/rust/amadeus-rs/lkt-lib/src/connexion.rs

src/rust/amadeus-rs/lkt-lib/src/constants.rs

src/rust/amadeus-rs/lkt-lib/src/lib.rs

src/rust/amadeus-rs/lkt-lib/src/query.rs

src/rust/amadeus-rs/lkt-lib/src/response.rs

src/rust/amadeus-rs/lkt-lib/src/types.rs

src/rust/amadeus-rs/lkt-lib/src/uri.rs

src/rust/amadeus-rs/lkt-rs/src/main.rs