fix!(cli): Fix edid config loading from file, envs

Closes #32

See merge request !38

BREAKING CHANGE: edid no longer provides --config for selecting the path
of the configuration file to load; edid.toml (if present) and EDID_*
environment variables are loaded with the latter taking precedence if
settings are defined in both locations.

If edihkal_url is not specified from either config provider, a default
value is used: "http://localhost:8080"

build(cli): Add figment for config from env & toml
build(cli): Remove config dependency from edid

Implement GET /drugs

Closes #10

See merge request !37

Displayed subcomand is now "edid drug" but "drugs" is an accepted alias.

test(srv): Test GET /drugs route

feat!(client): Rewrite client as async w/ reqwest

See merge request !35

build(client): Remove ureq dependency from client
build(client): Add reqwest 0.11 to edihkal-client

Replace the client library implementation to use reqwest instead of
ureq.

Update define_drug to return the drug type directly instead of the
Response type.

Change Error type altogether to use sources of other error types.

feat: edihkal_tracing crate, tracing in edihkal-client, cargo resolver v2

Closes #21

See merge request !34

This removes some unnecessary conversion from the request data type into
a serde_json::Value.

build(client): Add tracing dependency to client

build(client): Add edihkal_tracing dev dependency
build(client): Add tokio dev dependency for tests
build(client): Add wiremock 0.5 dev dependency

test(srv): Add tracing to edihkal tests & separate test helper concerns

Closes #17

See merge request !32

build(srv): Remove axum-test-helper dev dependency
test(srv): Add bytes to dev dependencies
build(srv): Add json feat flag to reqwest dev dep

Remove edihkal_core

See merge request !31

These were written to familiarize myself with the correct vs incorrect
ways I could get a drug::ActiveModel, but they aren't really tests.

enhance(srv): Swap sqlx with sea-orm

See merge request !30

bdf6abf0 runs migrations on service
startup, so running sqlx migrate via init_db.sh is no longer required in
CI.