cargo: Switch to workspace lints (#1299)

* subxt: Remove unstable lints that cause compile warnings

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* cargo: Switch to workspace lints

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* cargo: Fix codec package at root level

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* cargo: Move profiles to the root level

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Fix lightclient and metadata crates

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Revert "cargo: Fix codec package at root level"

This reverts commit cdf9e1628d708a972673eb3a9e967b6896edbd73.

* Fix complexity clippy

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* cargo: Remove lints to be replaced by `cargo machete`

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* cargo: Remove unused dependencies (detected by machete)

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* ci: Add machete step

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* cargo: Bump rust version

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* ci: Rename machete step

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* ci: Rename cargo machete step

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

---------

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

subxt/examples/setup_client_custom_rpc.rs

@@ -1,3 +1,4 @@
+#![allow(missing_docs)]
 use std::{
     fmt::Write,
     pin::Pin,